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<a href="min__cost__flow_8cc.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2010-2021 Google LLC</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// you may not use this file except in compliance with the License.</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// You may obtain a copy of the License at</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment">// See the License for the specific language governing permissions and</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// limitations under the License.</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include "<a class="code" href="min__cost__flow_8h.html">ortools/graph/min_cost_flow.h</a>"</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include <algorithm></span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include <cmath></span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include <limits></span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include "absl/strings/str_format.h"</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include "<a class="code" href="commandlineflags_8h.html">ortools/base/commandlineflags.h</a>"</span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include "<a class="code" href="mathutil_8h.html">ortools/base/mathutil.h</a>"</span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include "<a class="code" href="graph_8h.html">ortools/graph/graph.h</a>"</span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include "<a class="code" href="graphs_8h.html">ortools/graph/graphs.h</a>"</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include "<a class="code" href="max__flow_8h.html">ortools/graph/max_flow.h</a>"</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="comment">// TODO(user): Remove these flags and expose the parameters in the API.</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="comment">// New clients, please do not use these flags!</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"><a class="line" href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e"> 30</a></span><a class="code hl_function" href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e">ABSL_FLAG</a>(int64_t, min_cost_flow_alpha, 5,</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="stringliteral">"Divide factor for epsilon at each refine step."</span>);</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="min__cost__flow_8cc.html#ab654e743d095008fe5ad6732d075b277"> 32</a></span><a class="code hl_function" href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e">ABSL_FLAG</a>(<span class="keywordtype">bool</span>, min_cost_flow_check_feasibility, <span class="keyword">true</span>,</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="stringliteral">"Check that the graph has enough capacity to send all supplies "</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="stringliteral">"and serve all demands. Also check that the sum of supplies "</span></div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="stringliteral">"is equal to the sum of demands."</span>);</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"><a class="line" href="min__cost__flow_8cc.html#a803ace201395b02478bfde7e58d49eaf"> 36</a></span><a class="code hl_function" href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e">ABSL_FLAG</a>(<span class="keywordtype">bool</span>, min_cost_flow_check_balance, <span class="keyword">true</span>,</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="stringliteral">"Check that the sum of supplies is equal to the sum of demands."</span>);</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"><a class="line" href="min__cost__flow_8cc.html#aa70ea6448e7fd69d81e2021d94a2eab7"> 38</a></span><a class="code hl_function" href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e">ABSL_FLAG</a>(<span class="keywordtype">bool</span>, min_cost_flow_check_costs, <span class="keyword">true</span>,</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="stringliteral">"Check that the magnitude of the costs will not exceed the "</span></div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="stringliteral">"precision of the machine when scaled (multiplied) by the number "</span></div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="stringliteral">"of nodes"</span>);</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"><a class="line" href="min__cost__flow_8cc.html#a12b05c4219aa2ee08e03b72c37c3e87e"> 42</a></span><a class="code hl_function" href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e">ABSL_FLAG</a>(<span class="keywordtype">bool</span>, min_cost_flow_check_result, <span class="keyword">true</span>,</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="stringliteral">"Check that the result is valid."</span>);</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a34e6d785d3dc22ee8d54bad8f1cf6cc2"> 48</a></span><a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a34e6d785d3dc22ee8d54bad8f1cf6cc2">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::GenericMinCostFlow</a>(</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>* graph)</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> : graph_(graph),</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> node_excess_(),</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> node_potential_(),</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> residual_arc_capacity_(),</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> first_admissible_arc_(),</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> active_nodes_(),</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> epsilon_(0),</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> alpha_(<a class="code hl_namespace" href="namespaceabsl.html">absl</a>::GetFlag(FLAGS_min_cost_flow_alpha)),</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> cost_scaling_factor_(1),</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> scaled_arc_unit_cost_(),</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> total_flow_cost_(0),</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> status_(NOT_SOLVED),</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> initial_node_excess_(),</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> feasible_node_excess_(),</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> stats_(<span class="stringliteral">"MinCostFlow"</span>),</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> feasibility_checked_(false),</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> use_price_update_(false),</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> check_feasibility_(<a class="code hl_namespace" href="namespaceabsl.html">absl</a>::GetFlag(FLAGS_min_cost_flow_check_feasibility)) {</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> max_num_nodes = <a class="code hl_function" href="structoperations__research_1_1_graphs.html#a9d530d16efbea1a29d61cb0325980a50">Graphs<Graph>::NodeReservation</a>(*graph_);</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">if</span> (max_num_nodes > 0) {</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> node_excess_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#a6d0d87121f91870c74db35aa4edfdc69">Reserve</a>(0, max_num_nodes - 1);</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> node_excess_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#ad5721f29af64d2e2ae014ead96192591">SetAll</a>(0);</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> node_potential_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#a6d0d87121f91870c74db35aa4edfdc69">Reserve</a>(0, max_num_nodes - 1);</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> node_potential_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#ad5721f29af64d2e2ae014ead96192591">SetAll</a>(0);</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> first_admissible_arc_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#a6d0d87121f91870c74db35aa4edfdc69">Reserve</a>(0, max_num_nodes - 1);</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> first_admissible_arc_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#ad5721f29af64d2e2ae014ead96192591">SetAll</a>(Graph::kNilArc);</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> initial_node_excess_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#a6d0d87121f91870c74db35aa4edfdc69">Reserve</a>(0, max_num_nodes - 1);</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> initial_node_excess_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#ad5721f29af64d2e2ae014ead96192591">SetAll</a>(0);</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> feasible_node_excess_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#a6d0d87121f91870c74db35aa4edfdc69">Reserve</a>(0, max_num_nodes - 1);</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> feasible_node_excess_.<a class="code hl_function" href="classoperations__research_1_1_z_vector.html#ad5721f29af64d2e2ae014ead96192591">SetAll</a>(0);</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> }</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> max_num_arcs = <a class="code hl_function" href="structoperations__research_1_1_graphs.html#a42fb6857e088a176a53232b910715260">Graphs<Graph>::ArcReservation</a>(*graph_);</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">if</span> (max_num_arcs > 0) {</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> residual_arc_capacity_.Reserve(-max_num_arcs, max_num_arcs - 1);</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> residual_arc_capacity_.SetAll(0);</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> scaled_arc_unit_cost_.Reserve(-max_num_arcs, max_num_arcs - 1);</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> scaled_arc_unit_cost_.SetAll(0);</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> }</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span>}</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c"> 91</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::SetNodeSupply</a>(</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node, <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> supply) {</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(graph_->IsNodeValid(node));</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> node_excess_.Set(node, supply);</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> initial_node_excess_.Set(node, supply);</div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> status_ = NOT_SOLVED;</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> feasibility_checked_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span>}</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> </div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#ab7f4041c8667d63761aecb9657823945"> 101</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#ab7f4041c8667d63761aecb9657823945">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::SetArcUnitCost</a>(</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, ArcScaledCostType unit_cost) {</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsArcDirect(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> scaled_arc_unit_cost_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, unit_cost);</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> scaled_arc_unit_cost_.Set(Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), -scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> status_ = NOT_SOLVED;</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> feasibility_checked_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span>}</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> </div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#aeb6622ffa760bc9403144736f8ac4ad4"> 111</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#aeb6622ffa760bc9403144736f8ac4ad4">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::SetArcCapacity</a>(</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, ArcFlowType new_capacity) {</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(0, new_capacity);</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsArcDirect(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> free_capacity = residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> capacity_delta = new_capacity - Capacity(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="keywordflow">if</span> (capacity_delta == 0) {</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keywordflow">return</span>; <span class="comment">// Nothing to do.</span></div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> }</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> status_ = NOT_SOLVED;</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> feasibility_checked_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> new_availability = free_capacity + capacity_delta;</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keywordflow">if</span> (new_availability >= 0) {</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="comment">// The above condition is true when one of two following holds:</span></div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="comment">// 1/ (capacity_delta > 0), meaning we are increasing the capacity</span></div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// 2/ (capacity_delta < 0 && free_capacity + capacity_delta >= 0)</span></div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="comment">// meaning we are reducing the capacity, but that the capacity</span></div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="comment">// reduction is not larger than the free capacity.</span></div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>((capacity_delta > 0) ||</div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> (capacity_delta < 0 && new_availability >= 0));</div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> residual_arc_capacity_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, new_availability);</div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(0, residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <span class="comment">// We have to reduce the flow on the arc, and update the excesses</span></div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="comment">// accordingly.</span></div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow = residual_arc_capacity_[Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)];</div>
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<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow_excess = flow - new_capacity;</div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> residual_arc_capacity_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, 0);</div>
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<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> residual_arc_capacity_.Set(Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), new_capacity);</div>
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<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a> = Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> node_excess_.Set(<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>] + flow_excess);</div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> node_excess_.Set(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>, node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] - flow_excess);</div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(0, residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(0, residual_arc_capacity_[Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)]);</div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> }</div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span>}</div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> </div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a89b020eea8abc71434d63071a1e38527"> 150</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a89b020eea8abc71434d63071a1e38527">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::SetArcFlow</a>(</div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, ArcFlowType new_flow) {</div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsArcValid(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a> = Capacity(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <a class="code hl_define" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(<a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a>, new_flow);</div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> residual_arc_capacity_.Set(Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), new_flow);</div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> residual_arc_capacity_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a> - new_flow);</div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> status_ = NOT_SOLVED;</div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> feasibility_checked_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span>}</div>
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<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> </div>
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<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span><span class="keywordtype">bool</span> <a class="code hl_class" href="classoperations__research_1_1_generic_min_cost_flow.html">GenericMinCostFlow</a><<a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>, ArcFlowType,</div>
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<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> ArcScaledCostType>::CheckInputConsistency()<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> total_supply = 0;</div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> uint64_t max_capacity = 0; <span class="comment">// uint64_t because it is positive and will be</span></div>
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<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="comment">// used to check against FlowQuantity overflows.</span></div>
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<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < graph_->num_arcs(); ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keyword">const</span> uint64_t <a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a> =</div>
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<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
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<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> max_capacity = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a>, max_capacity);</div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> }</div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> uint64_t total_flow = 0; <span class="comment">// uint64_t for the same reason as max_capacity.</span></div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> excess = node_excess_[node];</div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> total_supply += excess;</div>
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<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> <span class="keywordflow">if</span> (excess > 0) {</div>
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<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> total_flow += excess;</div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<FlowQuantity>::max</a>() <</div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> max_capacity + total_flow) {</div>
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<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"Input consistency error: max capacity + flow exceed "</span></div>
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<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> << <span class="stringliteral">"precision"</span>;</div>
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<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> }</div>
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<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> }</div>
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<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> }</div>
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<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> <span class="keywordflow">if</span> (total_supply != 0) {</div>
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<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"Input consistency error: unbalanced problem"</span>;</div>
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<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> }</div>
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<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span>}</div>
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<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> </div>
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<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::CheckResult()<span class="keyword"></span></div>
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<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span><span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="keywordflow">if</span> (node_excess_[node] != 0) {</div>
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<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"node_excess_["</span> << node << <span class="stringliteral">"] != 0"</span>;</div>
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<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> }</div>
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<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node); it.Ok();</div>
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<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> it.Next()) {</div>
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<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="keywordtype">bool</span> ok = <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="keywordflow">if</span> (residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] < 0) {</div>
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<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"residual_arc_capacity_["</span> << <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> << <span class="stringliteral">"] < 0"</span>;</div>
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<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> ok = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> }</div>
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<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> <span class="keywordflow">if</span> (residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] > 0 && ReducedCost(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) < -epsilon_) {</div>
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<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"residual_arc_capacity_["</span> << <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a></div>
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<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> << <span class="stringliteral">"] > 0 && ReducedCost("</span> << <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> << <span class="stringliteral">") < "</span> << -epsilon_</div>
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<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> << <span class="stringliteral">". (epsilon_ = "</span> << epsilon_ << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> ok = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> }</div>
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<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <span class="keywordflow">if</span> (!ok) {</div>
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<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << DebugString(<span class="stringliteral">"CheckResult "</span>, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> }</div>
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<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> }</div>
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<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> }</div>
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<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span>}</div>
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<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> </div>
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<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::CheckCostRange()<span class="keyword"></span></div>
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<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span><span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> min_cost_magnitude = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<CostValue>::max</a>();</div>
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<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> max_cost_magnitude = 0;</div>
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<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> <span class="comment">// Traverse the initial arcs of the graph:</span></div>
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<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < graph_->num_arcs(); ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> cost_magnitude = <a class="code hl_function" href="classoperations__research_1_1_math_util.html#a5a6f14696b2a09c97b58e4f0989b19e7">MathUtil::Abs</a>(scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
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<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> max_cost_magnitude = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(max_cost_magnitude, cost_magnitude);</div>
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<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <span class="keywordflow">if</span> (cost_magnitude != 0.0) {</div>
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<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> min_cost_magnitude = <a class="code hl_variable" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(min_cost_magnitude, cost_magnitude);</div>
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<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> }</div>
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<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> }</div>
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<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(3) << <span class="stringliteral">"Min cost magnitude = "</span> << min_cost_magnitude</div>
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<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> << <span class="stringliteral">", Max cost magnitude = "</span> << max_cost_magnitude;</div>
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<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span><span class="preprocessor">#if !defined(_MSC_VER)</span></div>
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<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="keywordflow">if</span> (log(<a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<CostValue>::max</a>()) <</div>
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<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> log(max_cost_magnitude + 1) + log(graph_->num_nodes() + 1)) {</div>
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<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"Maximum cost magnitude "</span> << max_cost_magnitude << <span class="stringliteral">" is too "</span></div>
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<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> << <span class="stringliteral">"high for the number of nodes. Try changing the data."</span>;</div>
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<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> }</div>
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<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span><span class="preprocessor">#endif</span></div>
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<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span>}</div>
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<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> </div>
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<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::</div>
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<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> CheckRelabelPrecondition(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> <span class="comment">// Note that the classical Relabel precondition assumes IsActive(node), i.e.,</span></div>
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<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> <span class="comment">// the node_excess_[node] > 0. However, to implement the Push Look-Ahead</span></div>
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<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> <span class="comment">// heuristic, we can relax this condition as explained in the section 4.3 of</span></div>
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<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> <span class="comment">// the article "An Efficient Implementation of a Scaling Minimum-Cost Flow</span></div>
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<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> <span class="comment">// Algorithm", A.V. Goldberg, Journal of Algorithms 22(1), January 1997, pp.</span></div>
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<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="comment">// 1-29.</span></div>
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<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <a class="code hl_define" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(node_excess_[node], 0);</div>
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<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node); it.Ok();</div>
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<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> it.Next()) {</div>
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<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!IsAdmissible(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)) << DebugString(<span class="stringliteral">"CheckRelabelPrecondition:"</span>, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> }</div>
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<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span>}</div>
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<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> </div>
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<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span>std::string</div>
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<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span>GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::DebugString(</div>
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<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">const</span> std::string& <a class="code hl_variable" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>, <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a> = Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> <span class="comment">// Reduced cost is computed directly without calling ReducedCost to avoid</span></div>
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<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> <span class="comment">// recursive calls between ReducedCost and DebugString in case a DCHECK in</span></div>
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<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> <span class="comment">// ReducedCost fails.</span></div>
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<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> reduced_cost = scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] +</div>
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<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>] - node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>];</div>
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<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> <span class="keywordflow">return</span> absl::StrFormat(</div>
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<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> <span class="stringliteral">"%s Arc %d, from %d to %d, "</span></div>
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<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="stringliteral">"Capacity = %d, Residual capacity = %d, "</span></div>
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<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> <span class="stringliteral">"Flow = residual capacity for reverse arc = %d, "</span></div>
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<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> <span class="stringliteral">"Height(tail) = %d, Height(head) = %d, "</span></div>
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<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> <span class="stringliteral">"Excess(tail) = %d, Excess(head) = %d, "</span></div>
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<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <span class="stringliteral">"Cost = %d, Reduced cost = %d, "</span>,</div>
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<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> <a class="code hl_variable" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>, Capacity(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>),</div>
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<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> <span class="keyword">static_cast<</span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a><span class="keyword">></span>(residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]), Flow(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>),</div>
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<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>], node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>], node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>],</div>
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<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>], <span class="keyword">static_cast<</span><a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a><span class="keyword">></span>(scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]),</div>
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<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> reduced_cost);</div>
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<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span>}</div>
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<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> </div>
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<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a92607deae80e69a2a63cc2d8f5205bd5"> 294</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a92607deae80e69a2a63cc2d8f5205bd5">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::</a></div>
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<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span><a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a92607deae80e69a2a63cc2d8f5205bd5"> CheckFeasibility</a>(std::vector<NodeIndex>* <span class="keyword">const</span> infeasible_supply_node,</div>
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<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> std::vector<NodeIndex>* <span class="keyword">const</span> infeasible_demand_node) {</div>
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<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> <span class="comment">// Create a new graph, which is a copy of graph_, with the following</span></div>
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<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> <span class="comment">// modifications:</span></div>
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<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> <span class="comment">// Two nodes are added: a source and a sink.</span></div>
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<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> <span class="comment">// The source is linked to each supply node (whose supply > 0) by an arc whose</span></div>
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<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> <span class="comment">// capacity is equal to the supply at the supply node.</span></div>
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<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> <span class="comment">// The sink is linked to each demand node (whose supply < 0) by an arc whose</span></div>
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<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> <span class="comment">// capacity is the demand (-supply) at the demand node.</span></div>
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<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> <span class="comment">// There are no supplies or demands or costs in the graph, as we will run</span></div>
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<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> <span class="comment">// max-flow.</span></div>
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<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> <span class="comment">// TODO(user): make it possible to share a graph by MaxFlow and MinCostFlow.</span></div>
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<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> <span class="comment">// For this it is necessary to make StarGraph resizable.</span></div>
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<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> feasibility_checked_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> num_extra_arcs = 0;</div>
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<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span> <span class="keywordflow">if</span> (initial_node_excess_[node] != 0) {</div>
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<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> ++num_extra_arcs;</div>
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<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span> }</div>
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<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> }</div>
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<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> num_nodes_in_max_flow = graph_->num_nodes() + 2;</div>
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<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> num_arcs_in_max_flow = graph_->num_arcs() + num_extra_arcs;</div>
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<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> source = num_nodes_in_max_flow - 2;</div>
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<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> sink = num_nodes_in_max_flow - 1;</div>
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<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> <a class="code hl_class" href="classoperations__research_1_1_ebert_graph.html">StarGraph</a> checker_graph(num_nodes_in_max_flow, num_arcs_in_max_flow);</div>
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<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> <a class="code hl_class" href="classoperations__research_1_1_max_flow.html">MaxFlow</a> checker(&checker_graph, source, sink);</div>
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<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#aa76638d2f8eddf2c3d9778b3c1285010">SetCheckInput</a>(<span class="keyword">false</span>);</div>
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<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#aa4e5f2ba9abcf71460c68a4903abc7bc">SetCheckResult</a>(<span class="keyword">false</span>);</div>
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<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> <span class="comment">// Copy graph_ to checker_graph.</span></div>
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<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < graph_->num_arcs(); ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> new_arc =</div>
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<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> checker_graph.<a class="code hl_function" href="classoperations__research_1_1_ebert_graph_base.html#a7b505ba4a01bce342d049f5a8674da72">AddArc</a>(graph_->Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), graph_->Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, new_arc);</div>
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<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a21776d0248204801a49c42b46902c1a1">SetArcCapacity</a>(new_arc, Capacity(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> }</div>
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<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> total_demand = 0;</div>
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<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> total_supply = 0;</div>
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<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> <span class="comment">// Create the source-to-supply node arcs and the demand-node-to-sink arcs.</span></div>
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<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> supply = initial_node_excess_[node];</div>
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<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span> <span class="keywordflow">if</span> (supply > 0) {</div>
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<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> new_arc = checker_graph.<a class="code hl_function" href="classoperations__research_1_1_ebert_graph_base.html#a7b505ba4a01bce342d049f5a8674da72">AddArc</a>(source, node);</div>
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<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"> 338</span> checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a21776d0248204801a49c42b46902c1a1">SetArcCapacity</a>(new_arc, supply);</div>
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<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a34e6d785d3dc22ee8d54bad8f1cf6cc2"> 339</a></span> total_supply += supply;</div>
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<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (supply < 0) {</div>
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<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> new_arc = checker_graph.<a class="code hl_function" href="classoperations__research_1_1_ebert_graph_base.html#a7b505ba4a01bce342d049f5a8674da72">AddArc</a>(node, sink);</div>
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<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span> checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a21776d0248204801a49c42b46902c1a1">SetArcCapacity</a>(new_arc, -supply);</div>
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<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> total_demand -= supply;</div>
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<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> }</div>
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<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span> }</div>
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<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span> <span class="keywordflow">if</span> (total_supply != total_demand) {</div>
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<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"total_supply("</span> << total_supply << <span class="stringliteral">") != total_demand("</span></div>
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<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> << total_demand << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span> }</div>
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<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c"> 351</a></span> <span class="keywordflow">if</span> (!checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a942f29030f08426e7e318204e987e2f7">Solve</a>()) {</div>
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<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"Max flow could not be computed."</span>;</div>
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<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#ab7f4041c8667d63761aecb9657823945"> 354</a></span> }</div>
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<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> optimal_max_flow = checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a142146c1af2855fc821d7bd4c0af6130">GetOptimalFlow</a>();</div>
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<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span> feasible_node_excess_.SetAll(0);</div>
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<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#aeb6622ffa760bc9403144736f8ac4ad4"> 357</a></span> <span class="keywordflow">for</span> (StarGraph::OutgoingArcIterator it(checker_graph, source); it.Ok();</div>
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<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> it.Next()) {</div>
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<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> <span class="keyword">const</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node = checker_graph.<a class="code hl_function" href="classoperations__research_1_1_star_graph_base.html#a5237cfbb86ec8f305e498e873e5c4e95">Head</a>(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a89b020eea8abc71434d63071a1e38527"> 361</a></span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow = checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a2a420ad8221c326064736ccf148d2f93">Flow</a>(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> feasible_node_excess_.Set(node, flow);</div>
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<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> <span class="keywordflow">if</span> (infeasible_supply_node != <span class="keyword">nullptr</span>) {</div>
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<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a942f29030f08426e7e318204e987e2f7"> 364</a></span> infeasible_supply_node->push_back(node);</div>
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<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span> }</div>
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<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> }</div>
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<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> <span class="keywordflow">for</span> (StarGraph::IncomingArcIterator it(checker_graph, sink); it.Ok();</div>
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<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> it.Next()) {</div>
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<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = checker_graph.<a class="code hl_function" href="classoperations__research_1_1_ebert_graph.html#aae684b1eb132c8c201f437d88e367b55">Tail</a>(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow = checker.<a class="code hl_function" href="classoperations__research_1_1_generic_max_flow.html#a2a420ad8221c326064736ccf148d2f93">Flow</a>(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span> feasible_node_excess_.Set(node, -flow);</div>
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<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span> <span class="keywordflow">if</span> (infeasible_demand_node != <span class="keyword">nullptr</span>) {</div>
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<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a92607deae80e69a2a63cc2d8f5205bd5"> 374</a></span> infeasible_demand_node->push_back(node);</div>
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<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</span> }</div>
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<div class="line"><a id="l00376" name="l00376"></a><span class="lineno"> 376</span> }</div>
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<div class="line"><a id="l00377" name="l00377"></a><span class="lineno"> 377</span> feasibility_checked_ = <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span> <span class="keywordflow">return</span> optimal_max_flow == total_supply;</div>
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<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span>}</div>
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<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span> </div>
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<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a3051a4b6d1a5a9fb5444f6d5a295a95c"> 382</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a3051a4b6d1a5a9fb5444f6d5a295a95c">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::MakeFeasible</a>() {</div>
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<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span> <span class="keywordflow">if</span> (!feasibility_checked_) {</div>
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<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</span> }</div>
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<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> excess = feasible_node_excess_[node];</div>
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<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span> node_excess_.Set(node, excess);</div>
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<div class="line"><a id="l00389" name="l00389"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93"> 389</a></span> initial_node_excess_.Set(node, excess);</div>
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<div class="line"><a id="l00390" name="l00390"></a><span class="lineno"> 390</span> }</div>
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<div class="line"><a id="l00391" name="l00391"></a><span class="lineno"> 391</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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|
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482"> 392</a></span>}</div>
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<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span> </div>
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<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93"> 395</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Flow</a>(</div>
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<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"> 397</span> <span class="keywordflow">if</span> (IsArcDirect(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)) {</div>
|
|
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</span> <span class="keywordflow">return</span> residual_arc_capacity_[Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)];</div>
|
|
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7"> 399</a></span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span> <span class="keywordflow">return</span> -residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
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|
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span> }</div>
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<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a84859dfe0d913de5132fd421bf5d002d"> 402</a></span>}</div>
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<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span> </div>
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<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span><span class="comment">// We use the equations given in the comment of residual_arc_capacity_.</span></div>
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|
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a></div>
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<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482"> 407</a></span><a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Capacity</a>(</div>
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<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a27a137ef3b0fb7f787eb460dcfd52591"> 408</a></span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span> <span class="keywordflow">if</span> (IsArcDirect(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)) {</div>
|
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<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span> <span class="keywordflow">return</span> residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] + residual_arc_capacity_[Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)];</div>
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<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00412" name="l00412"></a><span class="lineno"> 412</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"> 413</span> }</div>
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<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"> 414</span>}</div>
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<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span> </div>
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<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a1057f1a98821c9237d75967b575f3829"> 417</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a1057f1a98821c9237d75967b575f3829">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::UnitCost</a>(</div>
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<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsArcValid(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"> 420</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(uint64_t{1}, cost_scaling_factor_);</div>
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<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span> <span class="keywordflow">return</span> scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
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<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span>}</div>
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<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span> </div>
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<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7"> 425</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Supply</a>(</div>
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<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(graph_->IsNodeValid(node));</div>
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<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span> <span class="keywordflow">return</span> node_excess_[node];</div>
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<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span>}</div>
|
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<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span> </div>
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<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a></div>
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<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a84859dfe0d913de5132fd421bf5d002d"> 433</a></span><a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a84859dfe0d913de5132fd421bf5d002d">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::InitialSupply</a>(</div>
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<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span> <span class="keywordflow">return</span> initial_node_excess_[node];</div>
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|
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span>}</div>
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<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> </div>
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<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a></div>
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<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a27a137ef3b0fb7f787eb460dcfd52591"> 440</a></span><a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a27a137ef3b0fb7f787eb460dcfd52591">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::FeasibleSupply</a>(</div>
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<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span> <span class="keywordflow">return</span> feasible_node_excess_[node];</div>
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<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span>}</div>
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<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span> </div>
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<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00446" name="l00446"></a><span class="lineno"> 446</span><span class="keywordtype">bool</span> <a class="code hl_class" href="classoperations__research_1_1_generic_min_cost_flow.html">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::IsAdmissible</a>(</div>
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<div class="line"><a id="l00447" name="l00447"></a><span class="lineno"> 447</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00448" name="l00448"></a><span class="lineno"> 448</span> <span class="keywordflow">return</span> FastIsAdmissible(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, node_potential_[Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)]);</div>
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<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"> 449</span>}</div>
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<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span> </div>
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<div class="line"><a id="l00451" name="l00451"></a><span class="lineno"> 451</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00452" name="l00452"></a><span class="lineno"> 452</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::</div>
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<div class="line"><a id="l00453" name="l00453"></a><span class="lineno"> 453</span> FastIsAdmissible(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> tail_potential)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00454" name="l00454"></a><span class="lineno"> 454</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(node_potential_[Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)], tail_potential);</div>
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<div class="line"><a id="l00455" name="l00455"></a><span class="lineno"> 455</span> <span class="keywordflow">return</span> residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] > 0 &&</div>
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<div class="line"><a id="l00456" name="l00456"></a><span class="lineno"> 456</span> FastReducedCost(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, tail_potential) < 0;</div>
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<div class="line"><a id="l00457" name="l00457"></a><span class="lineno"> 457</span>}</div>
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<div class="line"><a id="l00458" name="l00458"></a><span class="lineno"> 458</span> </div>
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<div class="line"><a id="l00459" name="l00459"></a><span class="lineno"> 459</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00460" name="l00460"></a><span class="lineno"> 460</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::IsActive(</div>
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<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"> 462</span> <span class="keywordflow">return</span> node_excess_[node] > 0;</div>
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<div class="line"><a id="l00463" name="l00463"></a><span class="lineno"> 463</span>}</div>
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<div class="line"><a id="l00464" name="l00464"></a><span class="lineno"> 464</span> </div>
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<div class="line"><a id="l00465" name="l00465"></a><span class="lineno"> 465</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00466" name="l00466"></a><span class="lineno"> 466</span><a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a></div>
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<div class="line"><a id="l00467" name="l00467"></a><span class="lineno"> 467</span>GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::ReducedCost(</div>
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<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"> 468</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00469" name="l00469"></a><span class="lineno"> 469</span> <span class="keywordflow">return</span> FastReducedCost(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, node_potential_[Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)]);</div>
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<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"> 470</span>}</div>
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<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span> </div>
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<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00473" name="l00473"></a><span class="lineno"> 473</span><a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a></div>
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<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"> 474</span>GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::FastReducedCost(</div>
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<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> tail_potential)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(node_potential_[Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)], tail_potential);</div>
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<div class="line"><a id="l00477" name="l00477"></a><span class="lineno"> 477</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(graph_->IsNodeValid(Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)));</div>
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<div class="line"><a id="l00478" name="l00478"></a><span class="lineno"> 478</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(graph_->IsNodeValid(Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)));</div>
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<div class="line"><a id="l00479" name="l00479"></a><span class="lineno"> 479</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(node_potential_[Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)], 0) << DebugString(<span class="stringliteral">"ReducedCost:"</span>, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00480" name="l00480"></a><span class="lineno"> 480</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(node_potential_[Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)], 0) << DebugString(<span class="stringliteral">"ReducedCost:"</span>, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00481" name="l00481"></a><span class="lineno"> 481</span> <span class="keywordflow">return</span> scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] + tail_potential -</div>
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<div class="line"><a id="l00482" name="l00482"></a><span class="lineno"> 482</span> node_potential_[Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)];</div>
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<div class="line"><a id="l00483" name="l00483"></a><span class="lineno"> 483</span>}</div>
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<div class="line"><a id="l00484" name="l00484"></a><span class="lineno"> 484</span> </div>
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<div class="line"><a id="l00485" name="l00485"></a><span class="lineno"> 485</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00486" name="l00486"></a><span class="lineno"> 486</span><span class="keyword">typename</span> <a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::ArcIndex</a></div>
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<div class="line"><a id="l00487" name="l00487"></a><span class="lineno"> 487</span>GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::</div>
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<div class="line"><a id="l00488" name="l00488"></a><span class="lineno"> 488</span> GetFirstOutgoingOrOppositeIncomingArc(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00489" name="l00489"></a><span class="lineno"> 489</span> OutgoingOrOppositeIncomingArcIterator arc_it(*graph_, node);</div>
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<div class="line"><a id="l00490" name="l00490"></a><span class="lineno"> 490</span> <span class="keywordflow">return</span> arc_it.Index();</div>
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<div class="line"><a id="l00491" name="l00491"></a><span class="lineno"> 491</span>}</div>
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<div class="line"><a id="l00492" name="l00492"></a><span class="lineno"> 492</span> </div>
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<div class="line"><a id="l00493" name="l00493"></a><span class="lineno"> 493</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00494" name="l00494"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_generic_min_cost_flow.html#a942f29030f08426e7e318204e987e2f7"> 494</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1_generic_min_cost_flow.html#a942f29030f08426e7e318204e987e2f7">GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Solve</a>() {</div>
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<div class="line"><a id="l00495" name="l00495"></a><span class="lineno"> 495</span> status_ = NOT_SOLVED;</div>
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<div class="line"><a id="l00496" name="l00496"></a><span class="lineno"> 496</span> <span class="keywordflow">if</span> (absl::GetFlag(FLAGS_min_cost_flow_check_balance) &&</div>
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<div class="line"><a id="l00497" name="l00497"></a><span class="lineno"> 497</span> !CheckInputConsistency()) {</div>
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<div class="line"><a id="l00498" name="l00498"></a><span class="lineno"> 498</span> status_ = UNBALANCED;</div>
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<div class="line"><a id="l00499" name="l00499"></a><span class="lineno"> 499</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00500" name="l00500"></a><span class="lineno"> 500</span> }</div>
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<div class="line"><a id="l00501" name="l00501"></a><span class="lineno"> 501</span> <span class="keywordflow">if</span> (absl::GetFlag(FLAGS_min_cost_flow_check_costs) && !CheckCostRange()) {</div>
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<div class="line"><a id="l00502" name="l00502"></a><span class="lineno"> 502</span> status_ = BAD_COST_RANGE;</div>
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<div class="line"><a id="l00503" name="l00503"></a><span class="lineno"> 503</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00504" name="l00504"></a><span class="lineno"> 504</span> }</div>
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<div class="line"><a id="l00505" name="l00505"></a><span class="lineno"> 505</span> <span class="keywordflow">if</span> (check_feasibility_ && !CheckFeasibility(<span class="keyword">nullptr</span>, <span class="keyword">nullptr</span>)) {</div>
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<div class="line"><a id="l00506" name="l00506"></a><span class="lineno"> 506</span> status_ = <a class="code hl_enumvalue" href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8a6faaca695f728b47f47dd389f31e4a93">INFEASIBLE</a>;</div>
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<div class="line"><a id="l00507" name="l00507"></a><span class="lineno"> 507</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00508" name="l00508"></a><span class="lineno"> 508</span> }</div>
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<div class="line"><a id="l00509" name="l00509"></a><span class="lineno"> 509</span> node_potential_.SetAll(0);</div>
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<div class="line"><a id="l00510" name="l00510"></a><span class="lineno"> 510</span> ResetFirstAdmissibleArcs();</div>
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<div class="line"><a id="l00511" name="l00511"></a><span class="lineno"> 511</span> ScaleCosts();</div>
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<div class="line"><a id="l00512" name="l00512"></a><span class="lineno"> 512</span> Optimize();</div>
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<div class="line"><a id="l00513" name="l00513"></a><span class="lineno"> 513</span> <span class="keywordflow">if</span> (absl::GetFlag(FLAGS_min_cost_flow_check_result) && !CheckResult()) {</div>
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<div class="line"><a id="l00514" name="l00514"></a><span class="lineno"> 514</span> status_ = BAD_RESULT;</div>
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<div class="line"><a id="l00515" name="l00515"></a><span class="lineno"> 515</span> UnscaleCosts();</div>
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<div class="line"><a id="l00516" name="l00516"></a><span class="lineno"> 516</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00517" name="l00517"></a><span class="lineno"> 517</span> }</div>
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<div class="line"><a id="l00518" name="l00518"></a><span class="lineno"> 518</span> UnscaleCosts();</div>
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<div class="line"><a id="l00519" name="l00519"></a><span class="lineno"> 519</span> <span class="keywordflow">if</span> (status_ != <a class="code hl_enumvalue" href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8af00c8dbdd6e1f11bdae06be94277d293">OPTIMAL</a>) {</div>
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<div class="line"><a id="l00520" name="l00520"></a><span class="lineno"> 520</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(DFATAL) << <span class="stringliteral">"Status != OPTIMAL"</span>;</div>
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<div class="line"><a id="l00521" name="l00521"></a><span class="lineno"> 521</span> total_flow_cost_ = 0;</div>
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<div class="line"><a id="l00522" name="l00522"></a><span class="lineno"> 522</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00523" name="l00523"></a><span class="lineno"> 523</span> }</div>
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<div class="line"><a id="l00524" name="l00524"></a><span class="lineno"> 524</span> total_flow_cost_ = 0;</div>
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<div class="line"><a id="l00525" name="l00525"></a><span class="lineno"> 525</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < graph_->num_arcs(); ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00526" name="l00526"></a><span class="lineno"> 526</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow_on_arc = residual_arc_capacity_[Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)];</div>
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<div class="line"><a id="l00527" name="l00527"></a><span class="lineno"> 527</span> total_flow_cost_ += scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] * flow_on_arc;</div>
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<div class="line"><a id="l00528" name="l00528"></a><span class="lineno"> 528</span> }</div>
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<div class="line"><a id="l00529" name="l00529"></a><span class="lineno"> 529</span> status_ = <a class="code hl_enumvalue" href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8af00c8dbdd6e1f11bdae06be94277d293">OPTIMAL</a>;</div>
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<div class="line"><a id="l00530" name="l00530"></a><span class="lineno"> 530</span> <a class="code hl_define" href="stats_8h.html#a3c3e6b102f0d91c523099325c98e1887">IF_STATS_ENABLED</a>(<a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << stats_.StatString());</div>
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<div class="line"><a id="l00531" name="l00531"></a><span class="lineno"> 531</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00532" name="l00532"></a><span class="lineno"> 532</span>}</div>
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<div class="line"><a id="l00533" name="l00533"></a><span class="lineno"> 533</span> </div>
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<div class="line"><a id="l00534" name="l00534"></a><span class="lineno"> 534</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00535" name="l00535"></a><span class="lineno"> 535</span><span class="keywordtype">void</span> <a class="code hl_class" href="classoperations__research_1_1_generic_min_cost_flow.html">GenericMinCostFlow</a><<a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>, ArcFlowType,</div>
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<div class="line"><a id="l00536" name="l00536"></a><span class="lineno"> 536</span> ArcScaledCostType>::ResetFirstAdmissibleArcs() {</div>
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<div class="line"><a id="l00537" name="l00537"></a><span class="lineno"> 537</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00538" name="l00538"></a><span class="lineno"> 538</span> first_admissible_arc_.Set(node,</div>
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<div class="line"><a id="l00539" name="l00539"></a><span class="lineno"> 539</span> GetFirstOutgoingOrOppositeIncomingArc(node));</div>
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<div class="line"><a id="l00540" name="l00540"></a><span class="lineno"> 540</span> }</div>
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<div class="line"><a id="l00541" name="l00541"></a><span class="lineno"> 541</span>}</div>
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<div class="line"><a id="l00542" name="l00542"></a><span class="lineno"> 542</span> </div>
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<div class="line"><a id="l00543" name="l00543"></a><span class="lineno"> 543</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00544" name="l00544"></a><span class="lineno"> 544</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::ScaleCosts() {</div>
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<div class="line"><a id="l00545" name="l00545"></a><span class="lineno"> 545</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00546" name="l00546"></a><span class="lineno"> 546</span> cost_scaling_factor_ = graph_->num_nodes() + 1;</div>
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<div class="line"><a id="l00547" name="l00547"></a><span class="lineno"> 547</span> epsilon_ = 1LL;</div>
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<div class="line"><a id="l00548" name="l00548"></a><span class="lineno"> 548</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(3) << <span class="stringliteral">"Number of nodes in the graph = "</span> << graph_->num_nodes();</div>
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<div class="line"><a id="l00549" name="l00549"></a><span class="lineno"> 549</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(3) << <span class="stringliteral">"Number of arcs in the graph = "</span> << graph_->num_arcs();</div>
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<div class="line"><a id="l00550" name="l00550"></a><span class="lineno"> 550</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < graph_->num_arcs(); ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00551" name="l00551"></a><span class="lineno"> 551</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> <a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a> = scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] * cost_scaling_factor_;</div>
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<div class="line"><a id="l00552" name="l00552"></a><span class="lineno"> 552</span> scaled_arc_unit_cost_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a>);</div>
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<div class="line"><a id="l00553" name="l00553"></a><span class="lineno"> 553</span> scaled_arc_unit_cost_.Set(Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), -<a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a>);</div>
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<div class="line"><a id="l00554" name="l00554"></a><span class="lineno"> 554</span> epsilon_ = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(epsilon_, <a class="code hl_function" href="classoperations__research_1_1_math_util.html#a5a6f14696b2a09c97b58e4f0989b19e7">MathUtil::Abs</a>(<a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a>));</div>
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<div class="line"><a id="l00555" name="l00555"></a><span class="lineno"> 555</span> }</div>
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<div class="line"><a id="l00556" name="l00556"></a><span class="lineno"> 556</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(3) << <span class="stringliteral">"Initial epsilon = "</span> << epsilon_;</div>
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<div class="line"><a id="l00557" name="l00557"></a><span class="lineno"> 557</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(3) << <span class="stringliteral">"Cost scaling factor = "</span> << cost_scaling_factor_;</div>
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<div class="line"><a id="l00558" name="l00558"></a><span class="lineno"> 558</span>}</div>
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<div class="line"><a id="l00559" name="l00559"></a><span class="lineno"> 559</span> </div>
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<div class="line"><a id="l00560" name="l00560"></a><span class="lineno"> 560</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00561" name="l00561"></a><span class="lineno"> 561</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::UnscaleCosts() {</div>
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<div class="line"><a id="l00562" name="l00562"></a><span class="lineno"> 562</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00563" name="l00563"></a><span class="lineno"> 563</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < graph_->num_arcs(); ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00564" name="l00564"></a><span class="lineno"> 564</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> <a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a> = scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] / cost_scaling_factor_;</div>
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<div class="line"><a id="l00565" name="l00565"></a><span class="lineno"> 565</span> scaled_arc_unit_cost_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a>);</div>
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<div class="line"><a id="l00566" name="l00566"></a><span class="lineno"> 566</span> scaled_arc_unit_cost_.Set(Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), -<a class="code hl_variable" href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a>);</div>
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<div class="line"><a id="l00567" name="l00567"></a><span class="lineno"> 567</span> }</div>
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<div class="line"><a id="l00568" name="l00568"></a><span class="lineno"> 568</span> cost_scaling_factor_ = 1;</div>
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<div class="line"><a id="l00569" name="l00569"></a><span class="lineno"> 569</span>}</div>
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<div class="line"><a id="l00570" name="l00570"></a><span class="lineno"> 570</span> </div>
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<div class="line"><a id="l00571" name="l00571"></a><span class="lineno"> 571</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00572" name="l00572"></a><span class="lineno"> 572</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Optimize() {</div>
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<div class="line"><a id="l00573" name="l00573"></a><span class="lineno"> 573</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> kEpsilonMin = 1LL;</div>
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<div class="line"><a id="l00574" name="l00574"></a><span class="lineno"> 574</span> num_relabels_since_last_price_update_ = 0;</div>
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<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"> 575</span> <span class="keywordflow">do</span> {</div>
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<div class="line"><a id="l00576" name="l00576"></a><span class="lineno"> 576</span> <span class="comment">// Avoid epsilon_ == 0.</span></div>
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<div class="line"><a id="l00577" name="l00577"></a><span class="lineno"> 577</span> epsilon_ = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(epsilon_ / alpha_, kEpsilonMin);</div>
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<div class="line"><a id="l00578" name="l00578"></a><span class="lineno"> 578</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(3) << <span class="stringliteral">"Epsilon changed to: "</span> << epsilon_;</div>
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<div class="line"><a id="l00579" name="l00579"></a><span class="lineno"> 579</span> Refine();</div>
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<div class="line"><a id="l00580" name="l00580"></a><span class="lineno"> 580</span> } <span class="keywordflow">while</span> (epsilon_ != 1LL && status_ != INFEASIBLE);</div>
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<div class="line"><a id="l00581" name="l00581"></a><span class="lineno"> 581</span> <span class="keywordflow">if</span> (status_ == NOT_SOLVED) {</div>
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<div class="line"><a id="l00582" name="l00582"></a><span class="lineno"> 582</span> status_ = <a class="code hl_enumvalue" href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8af00c8dbdd6e1f11bdae06be94277d293">OPTIMAL</a>;</div>
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<div class="line"><a id="l00583" name="l00583"></a><span class="lineno"> 583</span> }</div>
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<div class="line"><a id="l00584" name="l00584"></a><span class="lineno"> 584</span>}</div>
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<div class="line"><a id="l00585" name="l00585"></a><span class="lineno"> 585</span> </div>
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<div class="line"><a id="l00586" name="l00586"></a><span class="lineno"> 586</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00587" name="l00587"></a><span class="lineno"> 587</span><span class="keywordtype">void</span> GenericMinCostFlow<<a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>, ArcFlowType,</div>
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<div class="line"><a id="l00588" name="l00588"></a><span class="lineno"> 588</span> ArcScaledCostType>::SaturateAdmissibleArcs() {</div>
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<div class="line"><a id="l00589" name="l00589"></a><span class="lineno"> 589</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00590" name="l00590"></a><span class="lineno"> 590</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00591" name="l00591"></a><span class="lineno"> 591</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> tail_potential = node_potential_[node];</div>
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<div class="line"><a id="l00592" name="l00592"></a><span class="lineno"> 592</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node,</div>
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<div class="line"><a id="l00593" name="l00593"></a><span class="lineno"> 593</span> first_admissible_arc_[node]);</div>
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<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"> 594</span> it.Ok(); it.Next()) {</div>
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<div class="line"><a id="l00595" name="l00595"></a><span class="lineno"> 595</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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<div class="line"><a id="l00596" name="l00596"></a><span class="lineno"> 596</span> <span class="keywordflow">if</span> (FastIsAdmissible(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, tail_potential)) {</div>
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<div class="line"><a id="l00597" name="l00597"></a><span class="lineno"> 597</span> FastPushFlow(residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>], <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, node);</div>
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<div class="line"><a id="l00598" name="l00598"></a><span class="lineno"> 598</span> }</div>
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<div class="line"><a id="l00599" name="l00599"></a><span class="lineno"> 599</span> }</div>
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<div class="line"><a id="l00600" name="l00600"></a><span class="lineno"> 600</span> </div>
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<div class="line"><a id="l00601" name="l00601"></a><span class="lineno"> 601</span> <span class="comment">// We just saturated all the admissible arcs, so there are no arcs with a</span></div>
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<div class="line"><a id="l00602" name="l00602"></a><span class="lineno"> 602</span> <span class="comment">// positive residual capacity that are incident to the current node.</span></div>
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<div class="line"><a id="l00603" name="l00603"></a><span class="lineno"> 603</span> <span class="comment">// Moreover, during the course of the algorithm, if the residual capacity of</span></div>
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<div class="line"><a id="l00604" name="l00604"></a><span class="lineno"> 604</span> <span class="comment">// such an arc becomes positive again, then the arc is still not admissible</span></div>
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<div class="line"><a id="l00605" name="l00605"></a><span class="lineno"> 605</span> <span class="comment">// until we relabel the node (because the reverse arc was admissible for</span></div>
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<div class="line"><a id="l00606" name="l00606"></a><span class="lineno"> 606</span> <span class="comment">// this to happen). In conclusion, the optimization below is correct.</span></div>
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<div class="line"><a id="l00607" name="l00607"></a><span class="lineno"> 607</span> first_admissible_arc_[node] = Graph::kNilArc;</div>
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<div class="line"><a id="l00608" name="l00608"></a><span class="lineno"> 608</span> }</div>
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<div class="line"><a id="l00609" name="l00609"></a><span class="lineno"> 609</span>}</div>
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<div class="line"><a id="l00610" name="l00610"></a><span class="lineno"> 610</span> </div>
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<div class="line"><a id="l00611" name="l00611"></a><span class="lineno"> 611</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00612" name="l00612"></a><span class="lineno"> 612</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::PushFlow(</div>
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<div class="line"><a id="l00613" name="l00613"></a><span class="lineno"> 613</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow, <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
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<div class="line"><a id="l00614" name="l00614"></a><span class="lineno"> 614</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00615" name="l00615"></a><span class="lineno"> 615</span> FastPushFlow(flow, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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<div class="line"><a id="l00616" name="l00616"></a><span class="lineno"> 616</span>}</div>
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<div class="line"><a id="l00617" name="l00617"></a><span class="lineno"> 617</span> </div>
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<div class="line"><a id="l00618" name="l00618"></a><span class="lineno"> 618</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00619" name="l00619"></a><span class="lineno"> 619</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::FastPushFlow(</div>
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<div class="line"><a id="l00620" name="l00620"></a><span class="lineno"> 620</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> flow, <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>) {</div>
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<div class="line"><a id="l00621" name="l00621"></a><span class="lineno"> 621</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00622" name="l00622"></a><span class="lineno"> 622</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(Tail(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), <a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>);</div>
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<div class="line"><a id="l00623" name="l00623"></a><span class="lineno"> 623</span> <a class="code hl_define" href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a>(residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>], 0);</div>
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<div class="line"><a id="l00624" name="l00624"></a><span class="lineno"> 624</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(flow, residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
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<div class="line"><a id="l00625" name="l00625"></a><span class="lineno"> 625</span> <span class="comment">// Reduce the residual capacity on the arc by flow.</span></div>
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<div class="line"><a id="l00626" name="l00626"></a><span class="lineno"> 626</span> residual_arc_capacity_.Set(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] - flow);</div>
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<div class="line"><a id="l00627" name="l00627"></a><span class="lineno"> 627</span> <span class="comment">// Increase the residual capacity on the opposite arc by flow.</span></div>
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<div class="line"><a id="l00628" name="l00628"></a><span class="lineno"> 628</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> opposite = Opposite(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00629" name="l00629"></a><span class="lineno"> 629</span> residual_arc_capacity_.Set(opposite, residual_arc_capacity_[opposite] + flow);</div>
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<div class="line"><a id="l00630" name="l00630"></a><span class="lineno"> 630</span> <span class="comment">// Update the excesses at the tail and head of the arc.</span></div>
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<div class="line"><a id="l00631" name="l00631"></a><span class="lineno"> 631</span> node_excess_.Set(<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>] - flow);</div>
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<div class="line"><a id="l00632" name="l00632"></a><span class="lineno"> 632</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00633" name="l00633"></a><span class="lineno"> 633</span> node_excess_.Set(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>, node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] + flow);</div>
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<div class="line"><a id="l00634" name="l00634"></a><span class="lineno"> 634</span>}</div>
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<div class="line"><a id="l00635" name="l00635"></a><span class="lineno"> 635</span> </div>
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<div class="line"><a id="l00636" name="l00636"></a><span class="lineno"> 636</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00637" name="l00637"></a><span class="lineno"> 637</span><span class="keywordtype">void</span> GenericMinCostFlow<<a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>, ArcFlowType,</div>
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<div class="line"><a id="l00638" name="l00638"></a><span class="lineno"> 638</span> ArcScaledCostType>::InitializeActiveNodeStack() {</div>
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<div class="line"><a id="l00639" name="l00639"></a><span class="lineno"> 639</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00640" name="l00640"></a><span class="lineno"> 640</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(active_nodes_.empty());</div>
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<div class="line"><a id="l00641" name="l00641"></a><span class="lineno"> 641</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < graph_->num_nodes(); ++node) {</div>
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<div class="line"><a id="l00642" name="l00642"></a><span class="lineno"> 642</span> <span class="keywordflow">if</span> (IsActive(node)) {</div>
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<div class="line"><a id="l00643" name="l00643"></a><span class="lineno"> 643</span> active_nodes_.push(node);</div>
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<div class="line"><a id="l00644" name="l00644"></a><span class="lineno"> 644</span> }</div>
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<div class="line"><a id="l00645" name="l00645"></a><span class="lineno"> 645</span> }</div>
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<div class="line"><a id="l00646" name="l00646"></a><span class="lineno"> 646</span>}</div>
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<div class="line"><a id="l00647" name="l00647"></a><span class="lineno"> 647</span> </div>
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<div class="line"><a id="l00648" name="l00648"></a><span class="lineno"> 648</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00649" name="l00649"></a><span class="lineno"> 649</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::UpdatePrices() {</div>
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<div class="line"><a id="l00650" name="l00650"></a><span class="lineno"> 650</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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<div class="line"><a id="l00651" name="l00651"></a><span class="lineno"> 651</span> </div>
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<div class="line"><a id="l00652" name="l00652"></a><span class="lineno"> 652</span> <span class="comment">// The algorithm works as follows. Start with a set of nodes S containing all</span></div>
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<div class="line"><a id="l00653" name="l00653"></a><span class="lineno"> 653</span> <span class="comment">// the nodes with negative excess. Expand the set along reverse admissible</span></div>
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<div class="line"><a id="l00654" name="l00654"></a><span class="lineno"> 654</span> <span class="comment">// arcs. If at the end, the complement of S contains at least one node with</span></div>
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<div class="line"><a id="l00655" name="l00655"></a><span class="lineno"> 655</span> <span class="comment">// positive excess, relabel all the nodes in the complement of S by</span></div>
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<div class="line"><a id="l00656" name="l00656"></a><span class="lineno"> 656</span> <span class="comment">// subtracting epsilon from their current potential. See the paper cited in</span></div>
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<div class="line"><a id="l00657" name="l00657"></a><span class="lineno"> 657</span> <span class="comment">// the .h file.</span></div>
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|
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno"> 658</span> <span class="comment">//</span></div>
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|
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno"> 659</span> <span class="comment">// After this relabeling is done, the heuristic is reapplied by extending S as</span></div>
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<div class="line"><a id="l00660" name="l00660"></a><span class="lineno"> 660</span> <span class="comment">// much as possible, relabeling the complement of S, and so on until there is</span></div>
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<div class="line"><a id="l00661" name="l00661"></a><span class="lineno"> 661</span> <span class="comment">// no node with positive excess that is not in S. Note that this is not</span></div>
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|
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno"> 662</span> <span class="comment">// described in the paper.</span></div>
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|
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno"> 663</span> <span class="comment">//</span></div>
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|
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno"> 664</span> <span class="comment">// Note(user): The triggering mechanism of this UpdatePrices() is really</span></div>
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|
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno"> 665</span> <span class="comment">// important; if it is not done properly it may degrade performance!</span></div>
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|
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno"> 666</span> </div>
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<div class="line"><a id="l00667" name="l00667"></a><span class="lineno"> 667</span> <span class="comment">// This represents the set S.</span></div>
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<div class="line"><a id="l00668" name="l00668"></a><span class="lineno"> 668</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> num_nodes = graph_->num_nodes();</div>
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<div class="line"><a id="l00669" name="l00669"></a><span class="lineno"> 669</span> std::vector<NodeIndex> bfs_queue;</div>
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<div class="line"><a id="l00670" name="l00670"></a><span class="lineno"> 670</span> std::vector<bool> node_in_queue(num_nodes, <span class="keyword">false</span>);</div>
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|
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno"> 671</span> </div>
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<div class="line"><a id="l00672" name="l00672"></a><span class="lineno"> 672</span> <span class="comment">// This is used to update the potential of the nodes not in S.</span></div>
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<div class="line"><a id="l00673" name="l00673"></a><span class="lineno"> 673</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> kMinCostValue = <a class="code hl_variable" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<CostValue>::min</a>();</div>
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<div class="line"><a id="l00674" name="l00674"></a><span class="lineno"> 674</span> std::vector<CostValue> min_non_admissible_potential(num_nodes, kMinCostValue);</div>
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|
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno"> 675</span> std::vector<NodeIndex> nodes_to_process;</div>
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|
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno"> 676</span> </div>
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<div class="line"><a id="l00677" name="l00677"></a><span class="lineno"> 677</span> <span class="comment">// Sum of the positive excesses out of S, used for early exit.</span></div>
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|
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno"> 678</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> remaining_excess = 0;</div>
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|
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno"> 679</span> </div>
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|
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno"> 680</span> <span class="comment">// First consider the nodes which have a negative excess.</span></div>
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|
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno"> 681</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < num_nodes; ++node) {</div>
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|
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno"> 682</span> <span class="keywordflow">if</span> (node_excess_[node] < 0) {</div>
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|
<div class="line"><a id="l00683" name="l00683"></a><span class="lineno"> 683</span> bfs_queue.push_back(node);</div>
|
|
<div class="line"><a id="l00684" name="l00684"></a><span class="lineno"> 684</span> node_in_queue[node] = <span class="keyword">true</span>;</div>
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|
<div class="line"><a id="l00685" name="l00685"></a><span class="lineno"> 685</span> </div>
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|
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno"> 686</span> <span class="comment">// This uses the fact that the sum of excesses is always 0.</span></div>
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|
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno"> 687</span> remaining_excess -= node_excess_[node];</div>
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|
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno"> 688</span> }</div>
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|
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno"> 689</span> }</div>
|
|
<div class="line"><a id="l00690" name="l00690"></a><span class="lineno"> 690</span> </div>
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|
<div class="line"><a id="l00691" name="l00691"></a><span class="lineno"> 691</span> <span class="comment">// All the nodes not yet in the bfs_queue will have their potential changed by</span></div>
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|
<div class="line"><a id="l00692" name="l00692"></a><span class="lineno"> 692</span> <span class="comment">// +potential_delta (which becomes more and more negative at each pass). This</span></div>
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|
<div class="line"><a id="l00693" name="l00693"></a><span class="lineno"> 693</span> <span class="comment">// update is applied when a node is pushed into the queue and at the end of</span></div>
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|
<div class="line"><a id="l00694" name="l00694"></a><span class="lineno"> 694</span> <span class="comment">// the function for the nodes that are still unprocessed.</span></div>
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|
<div class="line"><a id="l00695" name="l00695"></a><span class="lineno"> 695</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> potential_delta = 0;</div>
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<div class="line"><a id="l00696" name="l00696"></a><span class="lineno"> 696</span> </div>
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|
<div class="line"><a id="l00697" name="l00697"></a><span class="lineno"> 697</span> <span class="keywordtype">int</span> queue_index = 0;</div>
|
|
<div class="line"><a id="l00698" name="l00698"></a><span class="lineno"> 698</span> <span class="keywordflow">while</span> (remaining_excess > 0) {</div>
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|
<div class="line"><a id="l00699" name="l00699"></a><span class="lineno"> 699</span> <span class="comment">// Reverse BFS that expands S as much as possible in the reverse admissible</span></div>
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|
<div class="line"><a id="l00700" name="l00700"></a><span class="lineno"> 700</span> <span class="comment">// graph. Once S cannot be expanded anymore, perform a relabeling on the</span></div>
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<div class="line"><a id="l00701" name="l00701"></a><span class="lineno"> 701</span> <span class="comment">// nodes not in S but that can reach it in one arc and try to expand S</span></div>
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|
<div class="line"><a id="l00702" name="l00702"></a><span class="lineno"> 702</span> <span class="comment">// again.</span></div>
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|
<div class="line"><a id="l00703" name="l00703"></a><span class="lineno"> 703</span> <span class="keywordflow">for</span> (; queue_index < bfs_queue.size(); ++queue_index) {</div>
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<div class="line"><a id="l00704" name="l00704"></a><span class="lineno"> 704</span> <a class="code hl_define" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(num_nodes, bfs_queue.size());</div>
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|
<div class="line"><a id="l00705" name="l00705"></a><span class="lineno"> 705</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = bfs_queue[queue_index];</div>
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<div class="line"><a id="l00706" name="l00706"></a><span class="lineno"> 706</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node); it.Ok();</div>
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<div class="line"><a id="l00707" name="l00707"></a><span class="lineno"> 707</span> it.Next()) {</div>
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<div class="line"><a id="l00708" name="l00708"></a><span class="lineno"> 708</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = Head(it.Index());</div>
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|
<div class="line"><a id="l00709" name="l00709"></a><span class="lineno"> 709</span> <span class="keywordflow">if</span> (node_in_queue[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>]) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00710" name="l00710"></a><span class="lineno"> 710</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> opposite_arc = Opposite(it.Index());</div>
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|
<div class="line"><a id="l00711" name="l00711"></a><span class="lineno"> 711</span> <span class="keywordflow">if</span> (residual_arc_capacity_[opposite_arc] > 0) {</div>
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|
<div class="line"><a id="l00712" name="l00712"></a><span class="lineno"> 712</span> node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] += potential_delta;</div>
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<div class="line"><a id="l00713" name="l00713"></a><span class="lineno"> 713</span> <span class="keywordflow">if</span> (ReducedCost(opposite_arc) < 0) {</div>
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|
<div class="line"><a id="l00714" name="l00714"></a><span class="lineno"> 714</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsAdmissible(opposite_arc));</div>
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|
<div class="line"><a id="l00715" name="l00715"></a><span class="lineno"> 715</span> </div>
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|
<div class="line"><a id="l00716" name="l00716"></a><span class="lineno"> 716</span> <span class="comment">// TODO(user): Try to steal flow if node_excess_[head] > 0.</span></div>
|
|
<div class="line"><a id="l00717" name="l00717"></a><span class="lineno"> 717</span> <span class="comment">// An initial experiment didn't show a big speedup though.</span></div>
|
|
<div class="line"><a id="l00718" name="l00718"></a><span class="lineno"> 718</span> </div>
|
|
<div class="line"><a id="l00719" name="l00719"></a><span class="lineno"> 719</span> remaining_excess -= node_excess_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>];</div>
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|
<div class="line"><a id="l00720" name="l00720"></a><span class="lineno"> 720</span> <span class="keywordflow">if</span> (remaining_excess == 0) {</div>
|
|
<div class="line"><a id="l00721" name="l00721"></a><span class="lineno"> 721</span> node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] -= potential_delta;</div>
|
|
<div class="line"><a id="l00722" name="l00722"></a><span class="lineno"> 722</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00723" name="l00723"></a><span class="lineno"> 723</span> }</div>
|
|
<div class="line"><a id="l00724" name="l00724"></a><span class="lineno"> 724</span> bfs_queue.push_back(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div>
|
|
<div class="line"><a id="l00725" name="l00725"></a><span class="lineno"> 725</span> node_in_queue[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00726" name="l00726"></a><span class="lineno"> 726</span> <span class="keywordflow">if</span> (potential_delta < 0) {</div>
|
|
<div class="line"><a id="l00727" name="l00727"></a><span class="lineno"> 727</span> first_admissible_arc_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] =</div>
|
|
<div class="line"><a id="l00728" name="l00728"></a><span class="lineno"> 728</span> GetFirstOutgoingOrOppositeIncomingArc(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div>
|
|
<div class="line"><a id="l00729" name="l00729"></a><span class="lineno"> 729</span> }</div>
|
|
<div class="line"><a id="l00730" name="l00730"></a><span class="lineno"> 730</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00731" name="l00731"></a><span class="lineno"> 731</span> <span class="comment">// The opposite_arc is not admissible but is in the residual graph;</span></div>
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|
<div class="line"><a id="l00732" name="l00732"></a><span class="lineno"> 732</span> <span class="comment">// this updates its min_non_admissible_potential.</span></div>
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|
<div class="line"><a id="l00733" name="l00733"></a><span class="lineno"> 733</span> node_potential_[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] -= potential_delta;</div>
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<div class="line"><a id="l00734" name="l00734"></a><span class="lineno"> 734</span> <span class="keywordflow">if</span> (min_non_admissible_potential[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] == kMinCostValue) {</div>
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|
<div class="line"><a id="l00735" name="l00735"></a><span class="lineno"> 735</span> nodes_to_process.push_back(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div>
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|
<div class="line"><a id="l00736" name="l00736"></a><span class="lineno"> 736</span> }</div>
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<div class="line"><a id="l00737" name="l00737"></a><span class="lineno"> 737</span> min_non_admissible_potential[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>] = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(</div>
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|
<div class="line"><a id="l00738" name="l00738"></a><span class="lineno"> 738</span> min_non_admissible_potential[<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>],</div>
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|
<div class="line"><a id="l00739" name="l00739"></a><span class="lineno"> 739</span> node_potential_[node] - scaled_arc_unit_cost_[opposite_arc]);</div>
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|
<div class="line"><a id="l00740" name="l00740"></a><span class="lineno"> 740</span> }</div>
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|
<div class="line"><a id="l00741" name="l00741"></a><span class="lineno"> 741</span> }</div>
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<div class="line"><a id="l00742" name="l00742"></a><span class="lineno"> 742</span> }</div>
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|
<div class="line"><a id="l00743" name="l00743"></a><span class="lineno"> 743</span> <span class="keywordflow">if</span> (remaining_excess == 0) <span class="keywordflow">break</span>;</div>
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|
<div class="line"><a id="l00744" name="l00744"></a><span class="lineno"> 744</span> }</div>
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|
<div class="line"><a id="l00745" name="l00745"></a><span class="lineno"> 745</span> <span class="keywordflow">if</span> (remaining_excess == 0) <span class="keywordflow">break</span>;</div>
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|
<div class="line"><a id="l00746" name="l00746"></a><span class="lineno"> 746</span> </div>
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|
<div class="line"><a id="l00747" name="l00747"></a><span class="lineno"> 747</span> <span class="comment">// Decrease by as much as possible instead of decreasing by epsilon.</span></div>
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|
<div class="line"><a id="l00748" name="l00748"></a><span class="lineno"> 748</span> <span class="comment">// TODO(user): Is it worth the extra loop?</span></div>
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|
<div class="line"><a id="l00749" name="l00749"></a><span class="lineno"> 749</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> max_potential_diff = kMinCostValue;</div>
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<div class="line"><a id="l00750" name="l00750"></a><span class="lineno"> 750</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < nodes_to_process.size(); ++i) {</div>
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|
<div class="line"><a id="l00751" name="l00751"></a><span class="lineno"> 751</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = nodes_to_process[i];</div>
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|
<div class="line"><a id="l00752" name="l00752"></a><span class="lineno"> 752</span> <span class="keywordflow">if</span> (node_in_queue[node]) <span class="keywordflow">continue</span>;</div>
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|
<div class="line"><a id="l00753" name="l00753"></a><span class="lineno"> 753</span> max_potential_diff =</div>
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|
<div class="line"><a id="l00754" name="l00754"></a><span class="lineno"> 754</span> <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(max_potential_diff,</div>
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|
<div class="line"><a id="l00755" name="l00755"></a><span class="lineno"> 755</span> min_non_admissible_potential[node] - node_potential_[node]);</div>
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|
<div class="line"><a id="l00756" name="l00756"></a><span class="lineno"> 756</span> <span class="keywordflow">if</span> (max_potential_diff == potential_delta) <span class="keywordflow">break</span>;</div>
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|
<div class="line"><a id="l00757" name="l00757"></a><span class="lineno"> 757</span> }</div>
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|
<div class="line"><a id="l00758" name="l00758"></a><span class="lineno"> 758</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(max_potential_diff, potential_delta);</div>
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|
<div class="line"><a id="l00759" name="l00759"></a><span class="lineno"> 759</span> potential_delta = max_potential_diff - epsilon_;</div>
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|
<div class="line"><a id="l00760" name="l00760"></a><span class="lineno"> 760</span> </div>
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|
<div class="line"><a id="l00761" name="l00761"></a><span class="lineno"> 761</span> <span class="comment">// Loop over nodes_to_process_ and for each node, apply the first of the</span></div>
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|
<div class="line"><a id="l00762" name="l00762"></a><span class="lineno"> 762</span> <span class="comment">// rules below that match or leave it in the queue for later iteration:</span></div>
|
|
<div class="line"><a id="l00763" name="l00763"></a><span class="lineno"> 763</span> <span class="comment">// - Remove it if it is already in the queue.</span></div>
|
|
<div class="line"><a id="l00764" name="l00764"></a><span class="lineno"> 764</span> <span class="comment">// - If the node is connected to S by an admissible arc after it is</span></div>
|
|
<div class="line"><a id="l00765" name="l00765"></a><span class="lineno"> 765</span> <span class="comment">// relabeled by +potential_delta, add it to bfs_queue_ and remove it from</span></div>
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|
<div class="line"><a id="l00766" name="l00766"></a><span class="lineno"> 766</span> <span class="comment">// nodes_to_process.</span></div>
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|
<div class="line"><a id="l00767" name="l00767"></a><span class="lineno"> 767</span> <span class="keywordtype">int</span> <a class="code hl_variable" href="local__search_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = 0;</div>
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|
<div class="line"><a id="l00768" name="l00768"></a><span class="lineno"> 768</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < nodes_to_process.size(); ++i) {</div>
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|
<div class="line"><a id="l00769" name="l00769"></a><span class="lineno"> 769</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = nodes_to_process[i];</div>
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|
<div class="line"><a id="l00770" name="l00770"></a><span class="lineno"> 770</span> <span class="keywordflow">if</span> (node_in_queue[node]) <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00771" name="l00771"></a><span class="lineno"> 771</span> <span class="keywordflow">if</span> (node_potential_[node] + potential_delta <</div>
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|
<div class="line"><a id="l00772" name="l00772"></a><span class="lineno"> 772</span> min_non_admissible_potential[node]) {</div>
|
|
<div class="line"><a id="l00773" name="l00773"></a><span class="lineno"> 773</span> node_potential_[node] += potential_delta;</div>
|
|
<div class="line"><a id="l00774" name="l00774"></a><span class="lineno"> 774</span> first_admissible_arc_[node] =</div>
|
|
<div class="line"><a id="l00775" name="l00775"></a><span class="lineno"> 775</span> GetFirstOutgoingOrOppositeIncomingArc(node);</div>
|
|
<div class="line"><a id="l00776" name="l00776"></a><span class="lineno"> 776</span> bfs_queue.push_back(node);</div>
|
|
<div class="line"><a id="l00777" name="l00777"></a><span class="lineno"> 777</span> node_in_queue[node] = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00778" name="l00778"></a><span class="lineno"> 778</span> remaining_excess -= node_excess_[node];</div>
|
|
<div class="line"><a id="l00779" name="l00779"></a><span class="lineno"> 779</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00780" name="l00780"></a><span class="lineno"> 780</span> }</div>
|
|
<div class="line"><a id="l00781" name="l00781"></a><span class="lineno"> 781</span> </div>
|
|
<div class="line"><a id="l00782" name="l00782"></a><span class="lineno"> 782</span> <span class="comment">// Keep the node for later iteration.</span></div>
|
|
<div class="line"><a id="l00783" name="l00783"></a><span class="lineno"> 783</span> nodes_to_process[<a class="code hl_variable" href="local__search_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>] = node;</div>
|
|
<div class="line"><a id="l00784" name="l00784"></a><span class="lineno"> 784</span> ++<a class="code hl_variable" href="local__search_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>;</div>
|
|
<div class="line"><a id="l00785" name="l00785"></a><span class="lineno"> 785</span> }</div>
|
|
<div class="line"><a id="l00786" name="l00786"></a><span class="lineno"> 786</span> nodes_to_process.resize(<a class="code hl_variable" href="local__search_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>);</div>
|
|
<div class="line"><a id="l00787" name="l00787"></a><span class="lineno"> 787</span> }</div>
|
|
<div class="line"><a id="l00788" name="l00788"></a><span class="lineno"> 788</span> </div>
|
|
<div class="line"><a id="l00789" name="l00789"></a><span class="lineno"> 789</span> <span class="comment">// Update the potentials of the nodes not yet processed.</span></div>
|
|
<div class="line"><a id="l00790" name="l00790"></a><span class="lineno"> 790</span> <span class="keywordflow">if</span> (potential_delta == 0) <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a id="l00791" name="l00791"></a><span class="lineno"> 791</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < num_nodes; ++node) {</div>
|
|
<div class="line"><a id="l00792" name="l00792"></a><span class="lineno"> 792</span> <span class="keywordflow">if</span> (!node_in_queue[node]) {</div>
|
|
<div class="line"><a id="l00793" name="l00793"></a><span class="lineno"> 793</span> node_potential_[node] += potential_delta;</div>
|
|
<div class="line"><a id="l00794" name="l00794"></a><span class="lineno"> 794</span> first_admissible_arc_[node] = GetFirstOutgoingOrOppositeIncomingArc(node);</div>
|
|
<div class="line"><a id="l00795" name="l00795"></a><span class="lineno"> 795</span> }</div>
|
|
<div class="line"><a id="l00796" name="l00796"></a><span class="lineno"> 796</span> }</div>
|
|
<div class="line"><a id="l00797" name="l00797"></a><span class="lineno"> 797</span>}</div>
|
|
<div class="line"><a id="l00798" name="l00798"></a><span class="lineno"> 798</span> </div>
|
|
<div class="line"><a id="l00799" name="l00799"></a><span class="lineno"> 799</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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|
<div class="line"><a id="l00800" name="l00800"></a><span class="lineno"> 800</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Refine() {</div>
|
|
<div class="line"><a id="l00801" name="l00801"></a><span class="lineno"> 801</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
|
|
<div class="line"><a id="l00802" name="l00802"></a><span class="lineno"> 802</span> SaturateAdmissibleArcs();</div>
|
|
<div class="line"><a id="l00803" name="l00803"></a><span class="lineno"> 803</span> InitializeActiveNodeStack();</div>
|
|
<div class="line"><a id="l00804" name="l00804"></a><span class="lineno"> 804</span> </div>
|
|
<div class="line"><a id="l00805" name="l00805"></a><span class="lineno"> 805</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> num_nodes = graph_->num_nodes();</div>
|
|
<div class="line"><a id="l00806" name="l00806"></a><span class="lineno"> 806</span> <span class="keywordflow">while</span> (status_ != INFEASIBLE && !active_nodes_.empty()) {</div>
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|
<div class="line"><a id="l00807" name="l00807"></a><span class="lineno"> 807</span> <span class="comment">// TODO(user): Experiment with different factors in front of num_nodes.</span></div>
|
|
<div class="line"><a id="l00808" name="l00808"></a><span class="lineno"> 808</span> <span class="keywordflow">if</span> (num_relabels_since_last_price_update_ >= num_nodes) {</div>
|
|
<div class="line"><a id="l00809" name="l00809"></a><span class="lineno"> 809</span> num_relabels_since_last_price_update_ = 0;</div>
|
|
<div class="line"><a id="l00810" name="l00810"></a><span class="lineno"> 810</span> <span class="keywordflow">if</span> (use_price_update_) {</div>
|
|
<div class="line"><a id="l00811" name="l00811"></a><span class="lineno"> 811</span> UpdatePrices();</div>
|
|
<div class="line"><a id="l00812" name="l00812"></a><span class="lineno"> 812</span> }</div>
|
|
<div class="line"><a id="l00813" name="l00813"></a><span class="lineno"> 813</span> }</div>
|
|
<div class="line"><a id="l00814" name="l00814"></a><span class="lineno"> 814</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = active_nodes_.top();</div>
|
|
<div class="line"><a id="l00815" name="l00815"></a><span class="lineno"> 815</span> active_nodes_.pop();</div>
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|
<div class="line"><a id="l00816" name="l00816"></a><span class="lineno"> 816</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsActive(node));</div>
|
|
<div class="line"><a id="l00817" name="l00817"></a><span class="lineno"> 817</span> Discharge(node);</div>
|
|
<div class="line"><a id="l00818" name="l00818"></a><span class="lineno"> 818</span> }</div>
|
|
<div class="line"><a id="l00819" name="l00819"></a><span class="lineno"> 819</span>}</div>
|
|
<div class="line"><a id="l00820" name="l00820"></a><span class="lineno"> 820</span> </div>
|
|
<div class="line"><a id="l00821" name="l00821"></a><span class="lineno"> 821</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00822" name="l00822"></a><span class="lineno"> 822</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Discharge(</div>
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<div class="line"><a id="l00823" name="l00823"></a><span class="lineno"> 823</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node) {</div>
|
|
<div class="line"><a id="l00824" name="l00824"></a><span class="lineno"> 824</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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|
<div class="line"><a id="l00825" name="l00825"></a><span class="lineno"> 825</span> <span class="keywordflow">do</span> {</div>
|
|
<div class="line"><a id="l00826" name="l00826"></a><span class="lineno"> 826</span> <span class="comment">// The node is initially active, and we exit as soon as it becomes</span></div>
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|
<div class="line"><a id="l00827" name="l00827"></a><span class="lineno"> 827</span> <span class="comment">// inactive.</span></div>
|
|
<div class="line"><a id="l00828" name="l00828"></a><span class="lineno"> 828</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsActive(node));</div>
|
|
<div class="line"><a id="l00829" name="l00829"></a><span class="lineno"> 829</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> tail_potential = node_potential_[node];</div>
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<div class="line"><a id="l00830" name="l00830"></a><span class="lineno"> 830</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node,</div>
|
|
<div class="line"><a id="l00831" name="l00831"></a><span class="lineno"> 831</span> first_admissible_arc_[node]);</div>
|
|
<div class="line"><a id="l00832" name="l00832"></a><span class="lineno"> 832</span> it.Ok(); it.Next()) {</div>
|
|
<div class="line"><a id="l00833" name="l00833"></a><span class="lineno"> 833</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
|
|
<div class="line"><a id="l00834" name="l00834"></a><span class="lineno"> 834</span> <span class="keywordflow">if</span> (FastIsAdmissible(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, tail_potential)) {</div>
|
|
<div class="line"><a id="l00835" name="l00835"></a><span class="lineno"> 835</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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|
<div class="line"><a id="l00836" name="l00836"></a><span class="lineno"> 836</span> <span class="keywordflow">if</span> (!LookAhead(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, tail_potential, <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>)) <span class="keywordflow">continue</span>;</div>
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|
<div class="line"><a id="l00837" name="l00837"></a><span class="lineno"> 837</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> head_active_before_push = IsActive(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div>
|
|
<div class="line"><a id="l00838" name="l00838"></a><span class="lineno"> 838</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_variable" href="resource_8cc.html#af12056bc2a8e3ec563f0940d87abbd2e">delta</a> =</div>
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|
<div class="line"><a id="l00839" name="l00839"></a><span class="lineno"> 839</span> <a class="code hl_variable" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(node_excess_[node],</div>
|
|
<div class="line"><a id="l00840" name="l00840"></a><span class="lineno"> 840</span> <span class="keyword">static_cast<</span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a><span class="keyword">></span>(residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]));</div>
|
|
<div class="line"><a id="l00841" name="l00841"></a><span class="lineno"> 841</span> FastPushFlow(<a class="code hl_variable" href="resource_8cc.html#af12056bc2a8e3ec563f0940d87abbd2e">delta</a>, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, node);</div>
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<div class="line"><a id="l00842" name="l00842"></a><span class="lineno"> 842</span> <span class="keywordflow">if</span> (IsActive(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>) && !head_active_before_push) {</div>
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<div class="line"><a id="l00843" name="l00843"></a><span class="lineno"> 843</span> active_nodes_.push(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div>
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|
<div class="line"><a id="l00844" name="l00844"></a><span class="lineno"> 844</span> }</div>
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<div class="line"><a id="l00845" name="l00845"></a><span class="lineno"> 845</span> <span class="keywordflow">if</span> (node_excess_[node] == 0) {</div>
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|
<div class="line"><a id="l00846" name="l00846"></a><span class="lineno"> 846</span> <span class="comment">// arc may still be admissible.</span></div>
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|
<div class="line"><a id="l00847" name="l00847"></a><span class="lineno"> 847</span> first_admissible_arc_.Set(node, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00848" name="l00848"></a><span class="lineno"> 848</span> <span class="keywordflow">return</span>;</div>
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|
<div class="line"><a id="l00849" name="l00849"></a><span class="lineno"> 849</span> }</div>
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<div class="line"><a id="l00850" name="l00850"></a><span class="lineno"> 850</span> }</div>
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<div class="line"><a id="l00851" name="l00851"></a><span class="lineno"> 851</span> }</div>
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|
<div class="line"><a id="l00852" name="l00852"></a><span class="lineno"> 852</span> Relabel(node);</div>
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<div class="line"><a id="l00853" name="l00853"></a><span class="lineno"> 853</span> } <span class="keywordflow">while</span> (status_ != INFEASIBLE);</div>
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<div class="line"><a id="l00854" name="l00854"></a><span class="lineno"> 854</span>}</div>
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<div class="line"><a id="l00855" name="l00855"></a><span class="lineno"> 855</span> </div>
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<div class="line"><a id="l00856" name="l00856"></a><span class="lineno"> 856</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00857" name="l00857"></a><span class="lineno"> 857</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::LookAhead(</div>
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|
<div class="line"><a id="l00858" name="l00858"></a><span class="lineno"> 858</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> in_arc, <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> in_tail_potential, <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node) {</div>
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<div class="line"><a id="l00859" name="l00859"></a><span class="lineno"> 859</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
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|
<div class="line"><a id="l00860" name="l00860"></a><span class="lineno"> 860</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(Head(in_arc), node);</div>
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|
<div class="line"><a id="l00861" name="l00861"></a><span class="lineno"> 861</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(node_potential_[Tail(in_arc)], in_tail_potential);</div>
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|
<div class="line"><a id="l00862" name="l00862"></a><span class="lineno"> 862</span> <span class="keywordflow">if</span> (node_excess_[node] < 0) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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|
<div class="line"><a id="l00863" name="l00863"></a><span class="lineno"> 863</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> tail_potential = node_potential_[node];</div>
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|
<div class="line"><a id="l00864" name="l00864"></a><span class="lineno"> 864</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node,</div>
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|
<div class="line"><a id="l00865" name="l00865"></a><span class="lineno"> 865</span> first_admissible_arc_[node]);</div>
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|
<div class="line"><a id="l00866" name="l00866"></a><span class="lineno"> 866</span> it.Ok(); it.Next()) {</div>
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|
<div class="line"><a id="l00867" name="l00867"></a><span class="lineno"> 867</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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|
<div class="line"><a id="l00868" name="l00868"></a><span class="lineno"> 868</span> <span class="keywordflow">if</span> (FastIsAdmissible(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, tail_potential)) {</div>
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|
<div class="line"><a id="l00869" name="l00869"></a><span class="lineno"> 869</span> first_admissible_arc_.Set(node, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
|
|
<div class="line"><a id="l00870" name="l00870"></a><span class="lineno"> 870</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00871" name="l00871"></a><span class="lineno"> 871</span> }</div>
|
|
<div class="line"><a id="l00872" name="l00872"></a><span class="lineno"> 872</span> }</div>
|
|
<div class="line"><a id="l00873" name="l00873"></a><span class="lineno"> 873</span> </div>
|
|
<div class="line"><a id="l00874" name="l00874"></a><span class="lineno"> 874</span> <span class="comment">// The node we looked ahead has no admissible arc at its current potential.</span></div>
|
|
<div class="line"><a id="l00875" name="l00875"></a><span class="lineno"> 875</span> <span class="comment">// We relabel it and return true if the original arc is still admissible.</span></div>
|
|
<div class="line"><a id="l00876" name="l00876"></a><span class="lineno"> 876</span> Relabel(node);</div>
|
|
<div class="line"><a id="l00877" name="l00877"></a><span class="lineno"> 877</span> <span class="keywordflow">return</span> FastIsAdmissible(in_arc, in_tail_potential);</div>
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|
<div class="line"><a id="l00878" name="l00878"></a><span class="lineno"> 878</span>}</div>
|
|
<div class="line"><a id="l00879" name="l00879"></a><span class="lineno"> 879</span> </div>
|
|
<div class="line"><a id="l00880" name="l00880"></a><span class="lineno"> 880</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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|
<div class="line"><a id="l00881" name="l00881"></a><span class="lineno"> 881</span><span class="keywordtype">void</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Relabel(</div>
|
|
<div class="line"><a id="l00882" name="l00882"></a><span class="lineno"> 882</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node) {</div>
|
|
<div class="line"><a id="l00883" name="l00883"></a><span class="lineno"> 883</span> <a class="code hl_define" href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a>(&stats_);</div>
|
|
<div class="line"><a id="l00884" name="l00884"></a><span class="lineno"> 884</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(CheckRelabelPrecondition(node));</div>
|
|
<div class="line"><a id="l00885" name="l00885"></a><span class="lineno"> 885</span> ++num_relabels_since_last_price_update_;</div>
|
|
<div class="line"><a id="l00886" name="l00886"></a><span class="lineno"> 886</span> </div>
|
|
<div class="line"><a id="l00887" name="l00887"></a><span class="lineno"> 887</span> <span class="comment">// By setting node_potential_[node] to the guaranteed_new_potential we are</span></div>
|
|
<div class="line"><a id="l00888" name="l00888"></a><span class="lineno"> 888</span> <span class="comment">// sure to keep epsilon-optimality of the pseudo-flow. Note that we could</span></div>
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|
<div class="line"><a id="l00889" name="l00889"></a><span class="lineno"> 889</span> <span class="comment">// return right away with this value, but we prefer to check that this value</span></div>
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|
<div class="line"><a id="l00890" name="l00890"></a><span class="lineno"> 890</span> <span class="comment">// will lead to at least one admissible arc, and if not, to decrease the</span></div>
|
|
<div class="line"><a id="l00891" name="l00891"></a><span class="lineno"> 891</span> <span class="comment">// potential as much as possible.</span></div>
|
|
<div class="line"><a id="l00892" name="l00892"></a><span class="lineno"> 892</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> guaranteed_new_potential = node_potential_[node] - epsilon_;</div>
|
|
<div class="line"><a id="l00893" name="l00893"></a><span class="lineno"> 893</span> </div>
|
|
<div class="line"><a id="l00894" name="l00894"></a><span class="lineno"> 894</span> <span class="comment">// This will be updated to contain the minimum node potential for which</span></div>
|
|
<div class="line"><a id="l00895" name="l00895"></a><span class="lineno"> 895</span> <span class="comment">// the node has no admissible arc. We know that:</span></div>
|
|
<div class="line"><a id="l00896" name="l00896"></a><span class="lineno"> 896</span> <span class="comment">// - min_non_admissible_potential <= node_potential_[node]</span></div>
|
|
<div class="line"><a id="l00897" name="l00897"></a><span class="lineno"> 897</span> <span class="comment">// - We can set the new node potential to min_non_admissible_potential -</span></div>
|
|
<div class="line"><a id="l00898" name="l00898"></a><span class="lineno"> 898</span> <span class="comment">// epsilon_ and still keep the epsilon-optimality of the pseudo flow.</span></div>
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|
<div class="line"><a id="l00899" name="l00899"></a><span class="lineno"> 899</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> kMinCostValue = <a class="code hl_variable" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<CostValue>::min</a>();</div>
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|
<div class="line"><a id="l00900" name="l00900"></a><span class="lineno"> 900</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> min_non_admissible_potential = kMinCostValue;</div>
|
|
<div class="line"><a id="l00901" name="l00901"></a><span class="lineno"> 901</span> </div>
|
|
<div class="line"><a id="l00902" name="l00902"></a><span class="lineno"> 902</span> <span class="comment">// The following variables help setting the first_admissible_arc_[node] to a</span></div>
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|
<div class="line"><a id="l00903" name="l00903"></a><span class="lineno"> 903</span> <span class="comment">// value different from GetFirstOutgoingOrOppositeIncomingArc(node) which</span></div>
|
|
<div class="line"><a id="l00904" name="l00904"></a><span class="lineno"> 904</span> <span class="comment">// avoids looking again at some arcs.</span></div>
|
|
<div class="line"><a id="l00905" name="l00905"></a><span class="lineno"> 905</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> previous_min_non_admissible_potential = kMinCostValue;</div>
|
|
<div class="line"><a id="l00906" name="l00906"></a><span class="lineno"> 906</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> first_arc = Graph::kNilArc;</div>
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|
<div class="line"><a id="l00907" name="l00907"></a><span class="lineno"> 907</span> </div>
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|
<div class="line"><a id="l00908" name="l00908"></a><span class="lineno"> 908</span> <span class="keywordflow">for</span> (OutgoingOrOppositeIncomingArcIterator it(*graph_, node); it.Ok();</div>
|
|
<div class="line"><a id="l00909" name="l00909"></a><span class="lineno"> 909</span> it.Next()) {</div>
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|
<div class="line"><a id="l00910" name="l00910"></a><span class="lineno"> 910</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = it.Index();</div>
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|
<div class="line"><a id="l00911" name="l00911"></a><span class="lineno"> 911</span> <span class="keywordflow">if</span> (residual_arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] > 0) {</div>
|
|
<div class="line"><a id="l00912" name="l00912"></a><span class="lineno"> 912</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> min_non_admissible_potential_for_arc =</div>
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|
<div class="line"><a id="l00913" name="l00913"></a><span class="lineno"> 913</span> node_potential_[Head(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)] - scaled_arc_unit_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
|
|
<div class="line"><a id="l00914" name="l00914"></a><span class="lineno"> 914</span> <span class="keywordflow">if</span> (min_non_admissible_potential_for_arc > min_non_admissible_potential) {</div>
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|
<div class="line"><a id="l00915" name="l00915"></a><span class="lineno"> 915</span> <span class="keywordflow">if</span> (min_non_admissible_potential_for_arc > guaranteed_new_potential) {</div>
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|
<div class="line"><a id="l00916" name="l00916"></a><span class="lineno"> 916</span> <span class="comment">// We found an admissible arc for the guaranteed_new_potential. We</span></div>
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|
<div class="line"><a id="l00917" name="l00917"></a><span class="lineno"> 917</span> <span class="comment">// stop right now instead of trying to compute the minimum possible</span></div>
|
|
<div class="line"><a id="l00918" name="l00918"></a><span class="lineno"> 918</span> <span class="comment">// new potential that keeps the epsilon-optimality of the pseudo flow.</span></div>
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<div class="line"><a id="l00919" name="l00919"></a><span class="lineno"> 919</span> node_potential_.Set(node, guaranteed_new_potential);</div>
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|
<div class="line"><a id="l00920" name="l00920"></a><span class="lineno"> 920</span> first_admissible_arc_.Set(node, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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|
<div class="line"><a id="l00921" name="l00921"></a><span class="lineno"> 921</span> <span class="keywordflow">return</span>;</div>
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|
<div class="line"><a id="l00922" name="l00922"></a><span class="lineno"> 922</span> }</div>
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|
<div class="line"><a id="l00923" name="l00923"></a><span class="lineno"> 923</span> previous_min_non_admissible_potential = min_non_admissible_potential;</div>
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|
<div class="line"><a id="l00924" name="l00924"></a><span class="lineno"> 924</span> min_non_admissible_potential = min_non_admissible_potential_for_arc;</div>
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|
<div class="line"><a id="l00925" name="l00925"></a><span class="lineno"> 925</span> first_arc = <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
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|
<div class="line"><a id="l00926" name="l00926"></a><span class="lineno"> 926</span> }</div>
|
|
<div class="line"><a id="l00927" name="l00927"></a><span class="lineno"> 927</span> }</div>
|
|
<div class="line"><a id="l00928" name="l00928"></a><span class="lineno"> 928</span> }</div>
|
|
<div class="line"><a id="l00929" name="l00929"></a><span class="lineno"> 929</span> </div>
|
|
<div class="line"><a id="l00930" name="l00930"></a><span class="lineno"> 930</span> <span class="comment">// No admissible arc leaves this node!</span></div>
|
|
<div class="line"><a id="l00931" name="l00931"></a><span class="lineno"> 931</span> <span class="keywordflow">if</span> (min_non_admissible_potential == kMinCostValue) {</div>
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|
<div class="line"><a id="l00932" name="l00932"></a><span class="lineno"> 932</span> <span class="keywordflow">if</span> (node_excess_[node] != 0) {</div>
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|
<div class="line"><a id="l00933" name="l00933"></a><span class="lineno"> 933</span> <span class="comment">// Note that this infeasibility detection is incomplete.</span></div>
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|
<div class="line"><a id="l00934" name="l00934"></a><span class="lineno"> 934</span> <span class="comment">// Only max flow can detect that a min-cost flow problem is infeasible.</span></div>
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|
<div class="line"><a id="l00935" name="l00935"></a><span class="lineno"> 935</span> status_ = <a class="code hl_enumvalue" href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8a6faaca695f728b47f47dd389f31e4a93">INFEASIBLE</a>;</div>
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|
<div class="line"><a id="l00936" name="l00936"></a><span class="lineno"> 936</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(ERROR) << <span class="stringliteral">"Infeasible problem."</span>;</div>
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|
<div class="line"><a id="l00937" name="l00937"></a><span class="lineno"> 937</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00938" name="l00938"></a><span class="lineno"> 938</span> <span class="comment">// This source saturates all its arcs, we can actually decrease the</span></div>
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|
<div class="line"><a id="l00939" name="l00939"></a><span class="lineno"> 939</span> <span class="comment">// potential by as much as we want.</span></div>
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|
<div class="line"><a id="l00940" name="l00940"></a><span class="lineno"> 940</span> <span class="comment">// TODO(user): Set it to a minimum value, but be careful of overflow.</span></div>
|
|
<div class="line"><a id="l00941" name="l00941"></a><span class="lineno"> 941</span> node_potential_.Set(node, guaranteed_new_potential);</div>
|
|
<div class="line"><a id="l00942" name="l00942"></a><span class="lineno"> 942</span> first_admissible_arc_.Set(node,</div>
|
|
<div class="line"><a id="l00943" name="l00943"></a><span class="lineno"> 943</span> GetFirstOutgoingOrOppositeIncomingArc(node));</div>
|
|
<div class="line"><a id="l00944" name="l00944"></a><span class="lineno"> 944</span> }</div>
|
|
<div class="line"><a id="l00945" name="l00945"></a><span class="lineno"> 945</span> <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a id="l00946" name="l00946"></a><span class="lineno"> 946</span> }</div>
|
|
<div class="line"><a id="l00947" name="l00947"></a><span class="lineno"> 947</span> </div>
|
|
<div class="line"><a id="l00948" name="l00948"></a><span class="lineno"> 948</span> <span class="comment">// We decrease the potential as much as possible, but we do not know the first</span></div>
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|
<div class="line"><a id="l00949" name="l00949"></a><span class="lineno"> 949</span> <span class="comment">// admissible arc (most of the time). Keeping the</span></div>
|
|
<div class="line"><a id="l00950" name="l00950"></a><span class="lineno"> 950</span> <span class="comment">// previous_min_non_admissible_potential makes it faster by a few percent.</span></div>
|
|
<div class="line"><a id="l00951" name="l00951"></a><span class="lineno"> 951</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> new_potential = min_non_admissible_potential - epsilon_;</div>
|
|
<div class="line"><a id="l00952" name="l00952"></a><span class="lineno"> 952</span> node_potential_.Set(node, new_potential);</div>
|
|
<div class="line"><a id="l00953" name="l00953"></a><span class="lineno"> 953</span> <span class="keywordflow">if</span> (previous_min_non_admissible_potential <= new_potential) {</div>
|
|
<div class="line"><a id="l00954" name="l00954"></a><span class="lineno"> 954</span> first_admissible_arc_.Set(node, first_arc);</div>
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|
<div class="line"><a id="l00955" name="l00955"></a><span class="lineno"> 955</span> } <span class="keywordflow">else</span> {</div>
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|
<div class="line"><a id="l00956" name="l00956"></a><span class="lineno"> 956</span> <span class="comment">// We have no indication of what may be the first admissible arc.</span></div>
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|
<div class="line"><a id="l00957" name="l00957"></a><span class="lineno"> 957</span> first_admissible_arc_.Set(node,</div>
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|
<div class="line"><a id="l00958" name="l00958"></a><span class="lineno"> 958</span> GetFirstOutgoingOrOppositeIncomingArc(node));</div>
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<div class="line"><a id="l00959" name="l00959"></a><span class="lineno"> 959</span> }</div>
|
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<div class="line"><a id="l00960" name="l00960"></a><span class="lineno"> 960</span>}</div>
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<div class="line"><a id="l00961" name="l00961"></a><span class="lineno"> 961</span> </div>
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<div class="line"><a id="l00962" name="l00962"></a><span class="lineno"> 962</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00963" name="l00963"></a><span class="lineno"> 963</span><span class="keyword">typename</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">Graph::ArcIndex</a></div>
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|
<div class="line"><a id="l00964" name="l00964"></a><span class="lineno"> 964</span>GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::Opposite(</div>
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|
<div class="line"><a id="l00965" name="l00965"></a><span class="lineno"> 965</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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|
<div class="line"><a id="l00966" name="l00966"></a><span class="lineno"> 966</span> <span class="keywordflow">return</span> <a class="code hl_function" href="structoperations__research_1_1_graphs.html#ae9cc106c6139c0b4e57057594bf56ea8">Graphs<Graph>::OppositeArc</a>(*graph_, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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<div class="line"><a id="l00967" name="l00967"></a><span class="lineno"> 967</span>}</div>
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<div class="line"><a id="l00968" name="l00968"></a><span class="lineno"> 968</span> </div>
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<div class="line"><a id="l00969" name="l00969"></a><span class="lineno"> 969</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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<div class="line"><a id="l00970" name="l00970"></a><span class="lineno"> 970</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::IsArcValid(</div>
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<div class="line"><a id="l00971" name="l00971"></a><span class="lineno"> 971</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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|
<div class="line"><a id="l00972" name="l00972"></a><span class="lineno"> 972</span> <span class="keywordflow">return</span> <a class="code hl_function" href="structoperations__research_1_1_graphs.html#ae02cd8602383e4fb48a8a933325db5fd">Graphs<Graph>::IsArcValid</a>(*graph_, <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
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|
<div class="line"><a id="l00973" name="l00973"></a><span class="lineno"> 973</span>}</div>
|
|
<div class="line"><a id="l00974" name="l00974"></a><span class="lineno"> 974</span> </div>
|
|
<div class="line"><a id="l00975" name="l00975"></a><span class="lineno"> 975</span><span class="keyword">template</span> <<span class="keyword">typename</span> Graph, <span class="keyword">typename</span> ArcFlowType, <span class="keyword">typename</span> ArcScaledCostType></div>
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|
<div class="line"><a id="l00976" name="l00976"></a><span class="lineno"> 976</span><span class="keywordtype">bool</span> GenericMinCostFlow<Graph, ArcFlowType, ArcScaledCostType>::IsArcDirect(</div>
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|
<div class="line"><a id="l00977" name="l00977"></a><span class="lineno"> 977</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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|
<div class="line"><a id="l00978" name="l00978"></a><span class="lineno"> 978</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(IsArcValid(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
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|
<div class="line"><a id="l00979" name="l00979"></a><span class="lineno"> 979</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> >= 0;</div>
|
|
<div class="line"><a id="l00980" name="l00980"></a><span class="lineno"> 980</span>}</div>
|
|
<div class="line"><a id="l00981" name="l00981"></a><span class="lineno"> 981</span> </div>
|
|
<div class="line"><a id="l00982" name="l00982"></a><span class="lineno"> 982</span><span class="comment">// Explicit instantiations that can be used by a client.</span></div>
|
|
<div class="line"><a id="l00983" name="l00983"></a><span class="lineno"> 983</span><span class="comment">//</span></div>
|
|
<div class="line"><a id="l00984" name="l00984"></a><span class="lineno"> 984</span><span class="comment">// TODO(user): Move this code out of a .cc file and include it at the end of</span></div>
|
|
<div class="line"><a id="l00985" name="l00985"></a><span class="lineno"> 985</span><span class="comment">// the header so it can work with any graph implementation?</span></div>
|
|
<div class="line"><a id="l00986" name="l00986"></a><span class="lineno"> 986</span><span class="keyword">template</span> <span class="keyword">class </span>GenericMinCostFlow<StarGraph>;</div>
|
|
<div class="line"><a id="l00987" name="l00987"></a><span class="lineno"> 987</span><span class="keyword">template</span> <span class="keyword">class </span>GenericMinCostFlow<::util::ReverseArcListGraph<>>;</div>
|
|
<div class="line"><a id="l00988" name="l00988"></a><span class="lineno"> 988</span><span class="keyword">template</span> <span class="keyword">class </span>GenericMinCostFlow<::util::ReverseArcStaticGraph<>>;</div>
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|
<div class="line"><a id="l00989" name="l00989"></a><span class="lineno"> 989</span><span class="keyword">template</span> <span class="keyword">class </span>GenericMinCostFlow<::util::ReverseArcMixedGraph<>>;</div>
|
|
<div class="line"><a id="l00990" name="l00990"></a><span class="lineno"> 990</span><span class="keyword">template</span> <span class="keyword">class </span>GenericMinCostFlow<</div>
|
|
<div class="line"><a id="l00991" name="l00991"></a><span class="lineno"> 991</span> <a class="code hl_class" href="classutil_1_1_reverse_arc_static_graph.html">::util::ReverseArcStaticGraph<uint16_t, int32_t></a>>;</div>
|
|
<div class="line"><a id="l00992" name="l00992"></a><span class="lineno"> 992</span> </div>
|
|
<div class="line"><a id="l00993" name="l00993"></a><span class="lineno"> 993</span><span class="comment">// A more memory-efficient version for large graphs.</span></div>
|
|
<div class="line"><a id="l00994" name="l00994"></a><span class="lineno"> 994</span><span class="keyword">template</span> <span class="keyword">class </span>GenericMinCostFlow<</div>
|
|
<div class="line"><a id="l00995" name="l00995"></a><span class="lineno"> 995</span> <a class="code hl_class" href="classutil_1_1_reverse_arc_static_graph.html">::util::ReverseArcStaticGraph<uint16_t, int32_t></a>,</div>
|
|
<div class="line"><a id="l00996" name="l00996"></a><span class="lineno"> 996</span> <span class="comment">/*ArcFlowType=*/</span>int16_t,</div>
|
|
<div class="line"><a id="l00997" name="l00997"></a><span class="lineno"> 997</span> <span class="comment">/*ArcScaledCostType=*/</span>int32_t>;</div>
|
|
<div class="line"><a id="l00998" name="l00998"></a><span class="lineno"> 998</span> </div>
|
|
<div class="line"><a id="l00999" name="l00999"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a6d65a7ab08c98b332781f187776683e5"> 999</a></span><a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a6d65a7ab08c98b332781f187776683e5">SimpleMinCostFlow::SimpleMinCostFlow</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> reserve_num_nodes,</div>
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|
<div class="line"><a id="l01000" name="l01000"></a><span class="lineno"> 1000</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> reserve_num_arcs) {</div>
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|
<div class="line"><a id="l01001" name="l01001"></a><span class="lineno"> 1001</span> <span class="keywordflow">if</span> (reserve_num_nodes > 0) {</div>
|
|
<div class="line"><a id="l01002" name="l01002"></a><span class="lineno"> 1002</span> node_supply_.reserve(reserve_num_nodes);</div>
|
|
<div class="line"><a id="l01003" name="l01003"></a><span class="lineno"> 1003</span> }</div>
|
|
<div class="line"><a id="l01004" name="l01004"></a><span class="lineno"> 1004</span> <span class="keywordflow">if</span> (reserve_num_arcs > 0) {</div>
|
|
<div class="line"><a id="l01005" name="l01005"></a><span class="lineno"> 1005</span> arc_tail_.reserve(reserve_num_arcs);</div>
|
|
<div class="line"><a id="l01006" name="l01006"></a><span class="lineno"> 1006</span> arc_head_.reserve(reserve_num_arcs);</div>
|
|
<div class="line"><a id="l01007" name="l01007"></a><span class="lineno"> 1007</span> arc_capacity_.reserve(reserve_num_arcs);</div>
|
|
<div class="line"><a id="l01008" name="l01008"></a><span class="lineno"> 1008</span> arc_cost_.reserve(reserve_num_arcs);</div>
|
|
<div class="line"><a id="l01009" name="l01009"></a><span class="lineno"> 1009</span> arc_permutation_.reserve(reserve_num_arcs);</div>
|
|
<div class="line"><a id="l01010" name="l01010"></a><span class="lineno"> 1010</span> arc_flow_.reserve(reserve_num_arcs);</div>
|
|
<div class="line"><a id="l01011" name="l01011"></a><span class="lineno"> 1011</span> }</div>
|
|
<div class="line"><a id="l01012" name="l01012"></a><span class="lineno"> 1012</span>}</div>
|
|
<div class="line"><a id="l01013" name="l01013"></a><span class="lineno"> 1013</span> </div>
|
|
<div class="line"><a id="l01014" name="l01014"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c"> 1014</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c">SimpleMinCostFlow::SetNodeSupply</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node, <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> supply) {</div>
|
|
<div class="line"><a id="l01015" name="l01015"></a><span class="lineno"> 1015</span> ResizeNodeVectors(node);</div>
|
|
<div class="line"><a id="l01016" name="l01016"></a><span class="lineno"> 1016</span> node_supply_[node] = supply;</div>
|
|
<div class="line"><a id="l01017" name="l01017"></a><span class="lineno"> 1017</span>}</div>
|
|
<div class="line"><a id="l01018" name="l01018"></a><span class="lineno"> 1018</span> </div>
|
|
<div class="line"><a id="l01019" name="l01019"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a20e10ea36c32c30c5130f300f1ffde2e"> 1019</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a20e10ea36c32c30c5130f300f1ffde2e">SimpleMinCostFlow::AddArcWithCapacityAndUnitCost</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>,</div>
|
|
<div class="line"><a id="l01020" name="l01020"></a><span class="lineno"> 1020</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>,</div>
|
|
<div class="line"><a id="l01021" name="l01021"></a><span class="lineno"> 1021</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a>,</div>
|
|
<div class="line"><a id="l01022" name="l01022"></a><span class="lineno"> 1022</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> unit_cost) {</div>
|
|
<div class="line"><a id="l01023" name="l01023"></a><span class="lineno"> 1023</span> ResizeNodeVectors(<a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, <a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>));</div>
|
|
<div class="line"><a id="l01024" name="l01024"></a><span class="lineno"> 1024</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = arc_tail_.size();</div>
|
|
<div class="line"><a id="l01025" name="l01025"></a><span class="lineno"> 1025</span> arc_tail_.push_back(<a class="code hl_variable" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>);</div>
|
|
<div class="line"><a id="l01026" name="l01026"></a><span class="lineno"> 1026</span> arc_head_.push_back(<a class="code hl_variable" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div>
|
|
<div class="line"><a id="l01027" name="l01027"></a><span class="lineno"> 1027</span> arc_capacity_.push_back(<a class="code hl_variable" href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a>);</div>
|
|
<div class="line"><a id="l01028" name="l01028"></a><span class="lineno"> 1028</span> arc_cost_.push_back(unit_cost);</div>
|
|
<div class="line"><a id="l01029" name="l01029"></a><span class="lineno"> 1029</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
|
|
<div class="line"><a id="l01030" name="l01030"></a><span class="lineno"> 1030</span>}</div>
|
|
<div class="line"><a id="l01031" name="l01031"></a><span class="lineno"> 1031</span> </div>
|
|
<div class="line"><a id="l01032" name="l01032"></a><span class="lineno"> 1032</span><a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> SimpleMinCostFlow::PermutedArc(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
|
|
<div class="line"><a id="l01033" name="l01033"></a><span class="lineno"> 1033</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < arc_permutation_.size() ? arc_permutation_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] : <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
|
|
<div class="line"><a id="l01034" name="l01034"></a><span class="lineno"> 1034</span>}</div>
|
|
<div class="line"><a id="l01035" name="l01035"></a><span class="lineno"> 1035</span> </div>
|
|
<div class="line"><a id="l01036" name="l01036"></a><span class="lineno"> 1036</span><a class="code hl_enumeration" href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70b">SimpleMinCostFlow::Status</a> SimpleMinCostFlow::SolveWithPossibleAdjustment(</div>
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|
<div class="line"><a id="l01037" name="l01037"></a><span class="lineno"> 1037</span> SupplyAdjustment adjustment) {</div>
|
|
<div class="line"><a id="l01038" name="l01038"></a><span class="lineno"> 1038</span> optimal_cost_ = 0;</div>
|
|
<div class="line"><a id="l01039" name="l01039"></a><span class="lineno"> 1039</span> maximum_flow_ = 0;</div>
|
|
<div class="line"><a id="l01040" name="l01040"></a><span class="lineno"> 1040</span> arc_flow_.clear();</div>
|
|
<div class="line"><a id="l01041" name="l01041"></a><span class="lineno"> 1041</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> num_nodes = node_supply_.size();</div>
|
|
<div class="line"><a id="l01042" name="l01042"></a><span class="lineno"> 1042</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> num_arcs = arc_capacity_.size();</div>
|
|
<div class="line"><a id="l01043" name="l01043"></a><span class="lineno"> 1043</span> <span class="keywordflow">if</span> (num_nodes == 0) <span class="keywordflow">return</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba2579881e7c83261bc21bafb5a5c92cad">OPTIMAL</a>;</div>
|
|
<div class="line"><a id="l01044" name="l01044"></a><span class="lineno"> 1044</span> </div>
|
|
<div class="line"><a id="l01045" name="l01045"></a><span class="lineno"> 1045</span> <span class="keywordtype">int</span> supply_node_count = 0, demand_node_count = 0;</div>
|
|
<div class="line"><a id="l01046" name="l01046"></a><span class="lineno"> 1046</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> total_supply = 0, total_demand = 0;</div>
|
|
<div class="line"><a id="l01047" name="l01047"></a><span class="lineno"> 1047</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < num_nodes; ++node) {</div>
|
|
<div class="line"><a id="l01048" name="l01048"></a><span class="lineno"> 1048</span> <span class="keywordflow">if</span> (node_supply_[node] > 0) {</div>
|
|
<div class="line"><a id="l01049" name="l01049"></a><span class="lineno"> 1049</span> ++supply_node_count;</div>
|
|
<div class="line"><a id="l01050" name="l01050"></a><span class="lineno"> 1050</span> total_supply += node_supply_[node];</div>
|
|
<div class="line"><a id="l01051" name="l01051"></a><span class="lineno"> 1051</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (node_supply_[node] < 0) {</div>
|
|
<div class="line"><a id="l01052" name="l01052"></a><span class="lineno"> 1052</span> ++demand_node_count;</div>
|
|
<div class="line"><a id="l01053" name="l01053"></a><span class="lineno"> 1053</span> total_demand -= node_supply_[node];</div>
|
|
<div class="line"><a id="l01054" name="l01054"></a><span class="lineno"> 1054</span> }</div>
|
|
<div class="line"><a id="l01055" name="l01055"></a><span class="lineno"> 1055</span> }</div>
|
|
<div class="line"><a id="l01056" name="l01056"></a><span class="lineno"> 1056</span> <span class="keywordflow">if</span> (adjustment == DONT_ADJUST && total_supply != total_demand) {</div>
|
|
<div class="line"><a id="l01057" name="l01057"></a><span class="lineno"> 1057</span> <span class="keywordflow">return</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba6a2175a75814f119266396a0e9681718">UNBALANCED</a>;</div>
|
|
<div class="line"><a id="l01058" name="l01058"></a><span class="lineno"> 1058</span> }</div>
|
|
<div class="line"><a id="l01059" name="l01059"></a><span class="lineno"> 1059</span> </div>
|
|
<div class="line"><a id="l01060" name="l01060"></a><span class="lineno"> 1060</span> <span class="comment">// Feasibility checking, and possible supply/demand adjustment, is done by:</span></div>
|
|
<div class="line"><a id="l01061" name="l01061"></a><span class="lineno"> 1061</span> <span class="comment">// 1. Creating a new source and sink node.</span></div>
|
|
<div class="line"><a id="l01062" name="l01062"></a><span class="lineno"> 1062</span> <span class="comment">// 2. Taking all nodes that have a non-zero supply or demand and</span></div>
|
|
<div class="line"><a id="l01063" name="l01063"></a><span class="lineno"> 1063</span> <span class="comment">// connecting them to the source or sink respectively. The arc thus</span></div>
|
|
<div class="line"><a id="l01064" name="l01064"></a><span class="lineno"> 1064</span> <span class="comment">// added has a capacity of the supply or demand.</span></div>
|
|
<div class="line"><a id="l01065" name="l01065"></a><span class="lineno"> 1065</span> <span class="comment">// 3. Computing the max flow between the new source and sink.</span></div>
|
|
<div class="line"><a id="l01066" name="l01066"></a><span class="lineno"> 1066</span> <span class="comment">// 4. If adjustment isn't being done, checking that the max flow is equal</span></div>
|
|
<div class="line"><a id="l01067" name="l01067"></a><span class="lineno"> 1067</span> <span class="comment">// to the total supply/demand (and returning INFEASIBLE if it isn't).</span></div>
|
|
<div class="line"><a id="l01068" name="l01068"></a><span class="lineno"> 1068</span> <span class="comment">// 5. Running min-cost max-flow on this augmented graph, using the max</span></div>
|
|
<div class="line"><a id="l01069" name="l01069"></a><span class="lineno"> 1069</span> <span class="comment">// flow computed in step 3 as the supply of the source and demand of</span></div>
|
|
<div class="line"><a id="l01070" name="l01070"></a><span class="lineno"> 1070</span> <span class="comment">// the sink.</span></div>
|
|
<div class="line"><a id="l01071" name="l01071"></a><span class="lineno"> 1071</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> augmented_num_arcs =</div>
|
|
<div class="line"><a id="l01072" name="l01072"></a><span class="lineno"> 1072</span> num_arcs + supply_node_count + demand_node_count;</div>
|
|
<div class="line"><a id="l01073" name="l01073"></a><span class="lineno"> 1073</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> source = num_nodes;</div>
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|
<div class="line"><a id="l01074" name="l01074"></a><span class="lineno"> 1074</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> sink = num_nodes + 1;</div>
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|
<div class="line"><a id="l01075" name="l01075"></a><span class="lineno"> 1075</span> <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> augmented_num_nodes = num_nodes + 2;</div>
|
|
<div class="line"><a id="l01076" name="l01076"></a><span class="lineno"> 1076</span> </div>
|
|
<div class="line"><a id="l01077" name="l01077"></a><span class="lineno"> 1077</span> <a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a> graph(augmented_num_nodes, augmented_num_arcs);</div>
|
|
<div class="line"><a id="l01078" name="l01078"></a><span class="lineno"> 1078</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < num_arcs; ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
|
|
<div class="line"><a id="l01079" name="l01079"></a><span class="lineno"> 1079</span> graph.AddArc(arc_tail_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>], arc_head_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
|
|
<div class="line"><a id="l01080" name="l01080"></a><span class="lineno"> 1080</span> }</div>
|
|
<div class="line"><a id="l01081" name="l01081"></a><span class="lineno"> 1081</span> </div>
|
|
<div class="line"><a id="l01082" name="l01082"></a><span class="lineno"> 1082</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < num_nodes; ++node) {</div>
|
|
<div class="line"><a id="l01083" name="l01083"></a><span class="lineno"> 1083</span> <span class="keywordflow">if</span> (node_supply_[node] > 0) {</div>
|
|
<div class="line"><a id="l01084" name="l01084"></a><span class="lineno"> 1084</span> graph.AddArc(source, node);</div>
|
|
<div class="line"><a id="l01085" name="l01085"></a><span class="lineno"> 1085</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (node_supply_[node] < 0) {</div>
|
|
<div class="line"><a id="l01086" name="l01086"></a><span class="lineno"> 1086</span> graph.AddArc(node, sink);</div>
|
|
<div class="line"><a id="l01087" name="l01087"></a><span class="lineno"> 1087</span> }</div>
|
|
<div class="line"><a id="l01088" name="l01088"></a><span class="lineno"> 1088</span> }</div>
|
|
<div class="line"><a id="l01089" name="l01089"></a><span class="lineno"> 1089</span> </div>
|
|
<div class="line"><a id="l01090" name="l01090"></a><span class="lineno"> 1090</span> graph.Build(&arc_permutation_);</div>
|
|
<div class="line"><a id="l01091" name="l01091"></a><span class="lineno"> 1091</span> </div>
|
|
<div class="line"><a id="l01092" name="l01092"></a><span class="lineno"> 1092</span> {</div>
|
|
<div class="line"><a id="l01093" name="l01093"></a><span class="lineno"> 1093</span> GenericMaxFlow<Graph> max_flow(&graph, source, sink);</div>
|
|
<div class="line"><a id="l01094" name="l01094"></a><span class="lineno"> 1094</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
|
|
<div class="line"><a id="l01095" name="l01095"></a><span class="lineno"> 1095</span> <span class="keywordflow">for</span> (<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < num_arcs; ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
|
|
<div class="line"><a id="l01096" name="l01096"></a><span class="lineno"> 1096</span> max_flow.SetArcCapacity(PermutedArc(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
|
|
<div class="line"><a id="l01097" name="l01097"></a><span class="lineno"> 1097</span> }</div>
|
|
<div class="line"><a id="l01098" name="l01098"></a><span class="lineno"> 1098</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < num_nodes; ++node) {</div>
|
|
<div class="line"><a id="l01099" name="l01099"></a><span class="lineno"> 1099</span> <span class="keywordflow">if</span> (node_supply_[node] != 0) {</div>
|
|
<div class="line"><a id="l01100" name="l01100"></a><span class="lineno"> 1100</span> max_flow.SetArcCapacity(PermutedArc(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>), std::abs(node_supply_[node]));</div>
|
|
<div class="line"><a id="l01101" name="l01101"></a><span class="lineno"> 1101</span> ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
|
|
<div class="line"><a id="l01102" name="l01102"></a><span class="lineno"> 1102</span> }</div>
|
|
<div class="line"><a id="l01103" name="l01103"></a><span class="lineno"> 1103</span> }</div>
|
|
<div class="line"><a id="l01104" name="l01104"></a><span class="lineno"> 1104</span> <a class="code hl_define" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>, augmented_num_arcs);</div>
|
|
<div class="line"><a id="l01105" name="l01105"></a><span class="lineno"> 1105</span> <span class="keywordflow">if</span> (!max_flow.Solve()) {</div>
|
|
<div class="line"><a id="l01106" name="l01106"></a><span class="lineno"> 1106</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(ERROR) << <span class="stringliteral">"Max flow could not be computed."</span>;</div>
|
|
<div class="line"><a id="l01107" name="l01107"></a><span class="lineno"> 1107</span> <span class="keywordflow">switch</span> (max_flow.status()) {</div>
|
|
<div class="line"><a id="l01108" name="l01108"></a><span class="lineno"> 1108</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_max_flow_status_class.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba0e6873a155f86a4695f463bf8601d05f">MaxFlowStatusClass::NOT_SOLVED</a>:</div>
|
|
<div class="line"><a id="l01109" name="l01109"></a><span class="lineno"> 1109</span> <span class="keywordflow">return</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba0e6873a155f86a4695f463bf8601d05f">NOT_SOLVED</a>;</div>
|
|
<div class="line"><a id="l01110" name="l01110"></a><span class="lineno"> 1110</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_max_flow_status_class.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba2579881e7c83261bc21bafb5a5c92cad">MaxFlowStatusClass::OPTIMAL</a>:</div>
|
|
<div class="line"><a id="l01111" name="l01111"></a><span class="lineno"> 1111</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(ERROR)</div>
|
|
<div class="line"><a id="l01112" name="l01112"></a><span class="lineno"> 1112</span> << <span class="stringliteral">"Max flow failed but claimed to have an optimal solution"</span>;</div>
|
|
<div class="line"><a id="l01113" name="l01113"></a><span class="lineno"> 1113</span> ABSL_FALLTHROUGH_INTENDED;</div>
|
|
<div class="line"><a id="l01114" name="l01114"></a><span class="lineno"> 1114</span> <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a id="l01115" name="l01115"></a><span class="lineno"> 1115</span> <span class="keywordflow">return</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70bac76ecfd837bdc6d4150bb02c403356e4">BAD_RESULT</a>;</div>
|
|
<div class="line"><a id="l01116" name="l01116"></a><span class="lineno"> 1116</span> }</div>
|
|
<div class="line"><a id="l01117" name="l01117"></a><span class="lineno"> 1117</span> }</div>
|
|
<div class="line"><a id="l01118" name="l01118"></a><span class="lineno"> 1118</span> maximum_flow_ = max_flow.GetOptimalFlow();</div>
|
|
<div class="line"><a id="l01119" name="l01119"></a><span class="lineno"> 1119</span> }</div>
|
|
<div class="line"><a id="l01120" name="l01120"></a><span class="lineno"> 1120</span> </div>
|
|
<div class="line"><a id="l01121" name="l01121"></a><span class="lineno"> 1121</span> <span class="keywordflow">if</span> (adjustment == DONT_ADJUST && maximum_flow_ != total_supply) {</div>
|
|
<div class="line"><a id="l01122" name="l01122"></a><span class="lineno"> 1122</span> <span class="keywordflow">return</span> <a class="code hl_enumvalue" href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba2884fa43446c0cbc9c7a9b74d41d7483">INFEASIBLE</a>;</div>
|
|
<div class="line"><a id="l01123" name="l01123"></a><span class="lineno"> 1123</span> }</div>
|
|
<div class="line"><a id="l01124" name="l01124"></a><span class="lineno"> 1124</span> </div>
|
|
<div class="line"><a id="l01125" name="l01125"></a><span class="lineno"> 1125</span> GenericMinCostFlow<Graph> min_cost_flow(&graph);</div>
|
|
<div class="line"><a id="l01126" name="l01126"></a><span class="lineno"> 1126</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
|
|
<div class="line"><a id="l01127" name="l01127"></a><span class="lineno"> 1127</span> <span class="keywordflow">for</span> (<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < num_arcs; ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
|
|
<div class="line"><a id="l01128" name="l01128"></a><span class="lineno"> 1128</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> permuted_arc = PermutedArc(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
|
|
<div class="line"><a id="l01129" name="l01129"></a><span class="lineno"> 1129</span> min_cost_flow.SetArcUnitCost(permuted_arc, arc_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
|
|
<div class="line"><a id="l01130" name="l01130"></a><span class="lineno"> 1130</span> min_cost_flow.SetArcCapacity(permuted_arc, arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]);</div>
|
|
<div class="line"><a id="l01131" name="l01131"></a><span class="lineno"> 1131</span> }</div>
|
|
<div class="line"><a id="l01132" name="l01132"></a><span class="lineno"> 1132</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node = 0; node < num_nodes; ++node) {</div>
|
|
<div class="line"><a id="l01133" name="l01133"></a><span class="lineno"> 1133</span> <span class="keywordflow">if</span> (node_supply_[node] != 0) {</div>
|
|
<div class="line"><a id="l01134" name="l01134"></a><span class="lineno"> 1134</span> <a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> permuted_arc = PermutedArc(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>);</div>
|
|
<div class="line"><a id="l01135" name="l01135"></a><span class="lineno"> 1135</span> min_cost_flow.SetArcCapacity(permuted_arc, std::abs(node_supply_[node]));</div>
|
|
<div class="line"><a id="l01136" name="l01136"></a><span class="lineno"> 1136</span> min_cost_flow.SetArcUnitCost(permuted_arc, 0);</div>
|
|
<div class="line"><a id="l01137" name="l01137"></a><span class="lineno"> 1137</span> ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>;</div>
|
|
<div class="line"><a id="l01138" name="l01138"></a><span class="lineno"> 1138</span> }</div>
|
|
<div class="line"><a id="l01139" name="l01139"></a><span class="lineno"> 1139</span> }</div>
|
|
<div class="line"><a id="l01140" name="l01140"></a><span class="lineno"> 1140</span> min_cost_flow.SetNodeSupply(source, maximum_flow_);</div>
|
|
<div class="line"><a id="l01141" name="l01141"></a><span class="lineno"> 1141</span> min_cost_flow.SetNodeSupply(sink, -maximum_flow_);</div>
|
|
<div class="line"><a id="l01142" name="l01142"></a><span class="lineno"> 1142</span> min_cost_flow.SetCheckFeasibility(<span class="keyword">false</span>);</div>
|
|
<div class="line"><a id="l01143" name="l01143"></a><span class="lineno"> 1143</span> </div>
|
|
<div class="line"><a id="l01144" name="l01144"></a><span class="lineno"> 1144</span> arc_flow_.resize(num_arcs);</div>
|
|
<div class="line"><a id="l01145" name="l01145"></a><span class="lineno"> 1145</span> <span class="keywordflow">if</span> (min_cost_flow.Solve()) {</div>
|
|
<div class="line"><a id="l01146" name="l01146"></a><span class="lineno"> 1146</span> optimal_cost_ = min_cost_flow.GetOptimalCost();</div>
|
|
<div class="line"><a id="l01147" name="l01147"></a><span class="lineno"> 1147</span> <span class="keywordflow">for</span> (<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> = 0; <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a> < num_arcs; ++<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>) {</div>
|
|
<div class="line"><a id="l01148" name="l01148"></a><span class="lineno"> 1148</span> arc_flow_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>] = min_cost_flow.Flow(PermutedArc(<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>));</div>
|
|
<div class="line"><a id="l01149" name="l01149"></a><span class="lineno"> 1149</span> }</div>
|
|
<div class="line"><a id="l01150" name="l01150"></a><span class="lineno"> 1150</span> }</div>
|
|
<div class="line"><a id="l01151" name="l01151"></a><span class="lineno"> 1151</span> <span class="keywordflow">return</span> min_cost_flow.status();</div>
|
|
<div class="line"><a id="l01152" name="l01152"></a><span class="lineno"> 1152</span>}</div>
|
|
<div class="line"><a id="l01153" name="l01153"></a><span class="lineno"> 1153</span> </div>
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<div class="line"><a id="l01154" name="l01154"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#ad39ce7ee10c34a3ce1f69f179aa4f1e9"> 1154</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#ad39ce7ee10c34a3ce1f69f179aa4f1e9">SimpleMinCostFlow::OptimalCost</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> optimal_cost_; }</div>
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<div class="line"><a id="l01155" name="l01155"></a><span class="lineno"> 1155</span> </div>
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<div class="line"><a id="l01156" name="l01156"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a3351fc1eb1dce4a7f6b937db874b5de1"> 1156</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a3351fc1eb1dce4a7f6b937db874b5de1">SimpleMinCostFlow::MaximumFlow</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> maximum_flow_; }</div>
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<div class="line"><a id="l01157" name="l01157"></a><span class="lineno"> 1157</span> </div>
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<div class="line"><a id="l01158" name="l01158"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93"> 1158</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93">SimpleMinCostFlow::Flow</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l01159" name="l01159"></a><span class="lineno"> 1159</span> <span class="keywordflow">return</span> arc_flow_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
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<div class="line"><a id="l01160" name="l01160"></a><span class="lineno"> 1160</span>}</div>
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<div class="line"><a id="l01161" name="l01161"></a><span class="lineno"> 1161</span> </div>
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<div class="line"><a id="l01162" name="l01162"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a3be0f6fcc44bc6a4a1e976c1e60b31d0"> 1162</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a3be0f6fcc44bc6a4a1e976c1e60b31d0">SimpleMinCostFlow::NumNodes</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> node_supply_.size(); }</div>
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<div class="line"><a id="l01163" name="l01163"></a><span class="lineno"> 1163</span> </div>
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<div class="line"><a id="l01164" name="l01164"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a7898be8b7efbfe53a58fcf621cf41315"> 1164</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a7898be8b7efbfe53a58fcf621cf41315">SimpleMinCostFlow::NumArcs</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> arc_tail_.size(); }</div>
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<div class="line"><a id="l01165" name="l01165"></a><span class="lineno"> 1165</span> </div>
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<div class="line"><a id="l01166" name="l01166"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a8f17f2cebe15f0a8f2b072738093379d"> 1166</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a8f17f2cebe15f0a8f2b072738093379d">SimpleMinCostFlow::Tail</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> arc_tail_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]; }</div>
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<div class="line"><a id="l01167" name="l01167"></a><span class="lineno"> 1167</span> </div>
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<div class="line"><a id="l01168" name="l01168"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#acf6f87e72f7535b5dfe004740ef52a1d"> 1168</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#acf6f87e72f7535b5dfe004740ef52a1d">SimpleMinCostFlow::Head</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> arc_head_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>]; }</div>
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<div class="line"><a id="l01169" name="l01169"></a><span class="lineno"> 1169</span> </div>
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<div class="line"><a id="l01170" name="l01170"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482"> 1170</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482">SimpleMinCostFlow::Capacity</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l01171" name="l01171"></a><span class="lineno"> 1171</span> <span class="keywordflow">return</span> arc_capacity_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
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<div class="line"><a id="l01172" name="l01172"></a><span class="lineno"> 1172</span>}</div>
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<div class="line"><a id="l01173" name="l01173"></a><span class="lineno"> 1173</span> </div>
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<div class="line"><a id="l01174" name="l01174"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#a1057f1a98821c9237d75967b575f3829"> 1174</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">CostValue</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#a1057f1a98821c9237d75967b575f3829">SimpleMinCostFlow::UnitCost</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">ArcIndex</a> <a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l01175" name="l01175"></a><span class="lineno"> 1175</span> <span class="keywordflow">return</span> arc_cost_[<a class="code hl_variable" href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a>];</div>
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<div class="line"><a id="l01176" name="l01176"></a><span class="lineno"> 1176</span>}</div>
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<div class="line"><a id="l01177" name="l01177"></a><span class="lineno"> 1177</span> </div>
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<div class="line"><a id="l01178" name="l01178"></a><span class="lineno"><a class="line" href="classoperations__research_1_1_simple_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7"> 1178</a></span><a class="code hl_typedef" href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">FlowQuantity</a> <a class="code hl_function" href="classoperations__research_1_1_simple_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7">SimpleMinCostFlow::Supply</a>(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l01179" name="l01179"></a><span class="lineno"> 1179</span> <span class="keywordflow">return</span> node_supply_[node];</div>
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<div class="line"><a id="l01180" name="l01180"></a><span class="lineno"> 1180</span>}</div>
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<div class="line"><a id="l01181" name="l01181"></a><span class="lineno"> 1181</span> </div>
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<div class="line"><a id="l01182" name="l01182"></a><span class="lineno"> 1182</span><span class="keywordtype">void</span> SimpleMinCostFlow::ResizeNodeVectors(<a class="code hl_typedef" href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">NodeIndex</a> node) {</div>
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<div class="line"><a id="l01183" name="l01183"></a><span class="lineno"> 1183</span> <span class="keywordflow">if</span> (node < node_supply_.size()) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l01184" name="l01184"></a><span class="lineno"> 1184</span> node_supply_.resize(node + 1);</div>
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<div class="line"><a id="l01185" name="l01185"></a><span class="lineno"> 1185</span>}</div>
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<div class="line"><a id="l01186" name="l01186"></a><span class="lineno"> 1186</span> </div>
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<div class="line"><a id="l01187" name="l01187"></a><span class="lineno"> 1187</span>} <span class="comment">// namespace operations_research</span></div>
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<div class="ttc" id="aalldiff__cst_8cc_html_a26e6db9bcc64b584051ecc28171ed11f"><div class="ttname"><a href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">max</a></div><div class="ttdeci">int64_t max</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00140">alldiff_cst.cc:140</a></div></div>
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<div class="ttc" id="aalldiff__cst_8cc_html_ad10edae0a852d72fb76afb1c77735045"><div class="ttname"><a href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">min</a></div><div class="ttdeci">int64_t min</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00139">alldiff_cst.cc:139</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_a4395e95bab44e222cb2e77251017a0e2"><div class="ttname"><a href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a></div><div class="ttdeci">#define DCHECK_LE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00893">base/logging.h:893</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_a7c0ce053b28d53aa4eaf3eb7fb71663b"><div class="ttname"><a href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a></div><div class="ttdeci">#define CHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00703">base/logging.h:703</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_aae2dc65d9ea248d54bf39daa986dd295"><div class="ttname"><a href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a></div><div class="ttdeci">#define DCHECK_GE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00895">base/logging.h:895</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ab4f56aa24c4c9cddc47a6abd2d747f9a"><div class="ttname"><a href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a></div><div class="ttdeci">#define DCHECK_GT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00896">base/logging.h:896</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_accad43a85d781d53381cd53a9894b6ae"><div class="ttname"><a href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a></div><div class="ttdeci">#define LOG(severity)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00420">base/logging.h:420</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ae17f8119c108cf3070bad3449c7e0006"><div class="ttname"><a href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a></div><div class="ttdeci">#define DCHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00890">base/logging.h:890</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ae89df3243bbb8341130c7b3f44145ea0"><div class="ttname"><a href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a></div><div class="ttdeci">#define DCHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00891">base/logging.h:891</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_afcaa7cadd41741bb855c2ada1d2ef927"><div class="ttname"><a href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a></div><div class="ttdeci">#define VLOG(verboselevel)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00984">base/logging.h:984</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_ebert_graph_base_html_a7b505ba4a01bce342d049f5a8674da72"><div class="ttname"><a href="classoperations__research_1_1_ebert_graph_base.html#a7b505ba4a01bce342d049f5a8674da72">operations_research::EbertGraphBase::AddArc</a></div><div class="ttdeci">ArcIndexType AddArc(NodeIndexType tail, NodeIndexType head)</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l01002">ebert_graph.h:1002</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_ebert_graph_html"><div class="ttname"><a href="classoperations__research_1_1_ebert_graph.html">operations_research::EbertGraph</a></div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l01187">ebert_graph.h:1189</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_ebert_graph_html_aae684b1eb132c8c201f437d88e367b55"><div class="ttname"><a href="classoperations__research_1_1_ebert_graph.html#aae684b1eb132c8c201f437d88e367b55">operations_research::EbertGraph::Tail</a></div><div class="ttdeci">NodeIndexType Tail(const ArcIndexType arc) const</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l01377">ebert_graph.h:1377</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_max_flow_html_a142146c1af2855fc821d7bd4c0af6130"><div class="ttname"><a href="classoperations__research_1_1_generic_max_flow.html#a142146c1af2855fc821d7bd4c0af6130">operations_research::GenericMaxFlow::GetOptimalFlow</a></div><div class="ttdeci">FlowQuantity GetOptimalFlow() const</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00361">max_flow.h:361</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_max_flow_html_a21776d0248204801a49c42b46902c1a1"><div class="ttname"><a href="classoperations__research_1_1_generic_max_flow.html#a21776d0248204801a49c42b46902c1a1">operations_research::GenericMaxFlow::SetArcCapacity</a></div><div class="ttdeci">void SetArcCapacity(ArcIndex arc, FlowQuantity new_capacity)</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8cc_source.html#l00190">max_flow.cc:190</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_max_flow_html_a2a420ad8221c326064736ccf148d2f93"><div class="ttname"><a href="classoperations__research_1_1_generic_max_flow.html#a2a420ad8221c326064736ccf148d2f93">operations_research::GenericMaxFlow::Flow</a></div><div class="ttdeci">FlowQuantity Flow(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00365">max_flow.h:365</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_max_flow_html_a942f29030f08426e7e318204e987e2f7"><div class="ttname"><a href="classoperations__research_1_1_generic_max_flow.html#a942f29030f08426e7e318204e987e2f7">operations_research::GenericMaxFlow::Solve</a></div><div class="ttdeci">bool Solve()</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8cc_source.html#l00349">max_flow.cc:349</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_max_flow_html_aa4e5f2ba9abcf71460c68a4903abc7bc"><div class="ttname"><a href="classoperations__research_1_1_generic_max_flow.html#aa4e5f2ba9abcf71460c68a4903abc7bc">operations_research::GenericMaxFlow::SetCheckResult</a></div><div class="ttdeci">void SetCheckResult(bool value)</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00420">max_flow.h:420</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_max_flow_html_aa76638d2f8eddf2c3d9778b3c1285010"><div class="ttname"><a href="classoperations__research_1_1_generic_max_flow.html#aa76638d2f8eddf2c3d9778b3c1285010">operations_research::GenericMaxFlow::SetCheckInput</a></div><div class="ttdeci">void SetCheckInput(bool value)</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00419">max_flow.h:419</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html">operations_research::GenericMinCostFlow</a></div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00327">min_cost_flow.h:327</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a1057f1a98821c9237d75967b575f3829"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a1057f1a98821c9237d75967b575f3829">operations_research::GenericMinCostFlow::UnitCost</a></div><div class="ttdeci">CostValue UnitCost(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00417">min_cost_flow.cc:417</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a27a137ef3b0fb7f787eb460dcfd52591"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a27a137ef3b0fb7f787eb460dcfd52591">operations_research::GenericMinCostFlow::FeasibleSupply</a></div><div class="ttdeci">FlowQuantity FeasibleSupply(NodeIndex node) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00440">min_cost_flow.cc:440</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a2a420ad8221c326064736ccf148d2f93"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93">operations_research::GenericMinCostFlow::Flow</a></div><div class="ttdeci">FlowQuantity Flow(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00395">min_cost_flow.cc:395</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a3051a4b6d1a5a9fb5444f6d5a295a95c"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a3051a4b6d1a5a9fb5444f6d5a295a95c">operations_research::GenericMinCostFlow::MakeFeasible</a></div><div class="ttdeci">bool MakeFeasible()</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00382">min_cost_flow.cc:382</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a34e6d785d3dc22ee8d54bad8f1cf6cc2"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a34e6d785d3dc22ee8d54bad8f1cf6cc2">operations_research::GenericMinCostFlow::GenericMinCostFlow</a></div><div class="ttdeci">GenericMinCostFlow(const Graph *graph)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00048">min_cost_flow.cc:48</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a44aa9e2f47277c91d8064c7126a2ff48"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a44aa9e2f47277c91d8064c7126a2ff48">operations_research::GenericMinCostFlow::ArcIndex</a></div><div class="ttdeci">Graph::ArcIndex ArcIndex</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00330">min_cost_flow.h:330</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a4ddaeee9414a17257bb052c459325caf"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a4ddaeee9414a17257bb052c459325caf">operations_research::GenericMinCostFlow::NodeIndex</a></div><div class="ttdeci">Graph::NodeIndex NodeIndex</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00329">min_cost_flow.h:329</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a7cd2dc0776a9f339b56ffac996a7df8c"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c">operations_research::GenericMinCostFlow::SetNodeSupply</a></div><div class="ttdeci">void SetNodeSupply(NodeIndex node, FlowQuantity supply)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00091">min_cost_flow.cc:91</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a84859dfe0d913de5132fd421bf5d002d"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a84859dfe0d913de5132fd421bf5d002d">operations_research::GenericMinCostFlow::InitialSupply</a></div><div class="ttdeci">FlowQuantity InitialSupply(NodeIndex node) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00433">min_cost_flow.cc:433</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a89b020eea8abc71434d63071a1e38527"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a89b020eea8abc71434d63071a1e38527">operations_research::GenericMinCostFlow::SetArcFlow</a></div><div class="ttdeci">void SetArcFlow(ArcIndex arc, ArcFlowType new_flow)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00150">min_cost_flow.cc:150</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a92607deae80e69a2a63cc2d8f5205bd5"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a92607deae80e69a2a63cc2d8f5205bd5">operations_research::GenericMinCostFlow::CheckFeasibility</a></div><div class="ttdeci">bool CheckFeasibility(std::vector< NodeIndex > *const infeasible_supply_node, std::vector< NodeIndex > *const infeasible_demand_node)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00294">min_cost_flow.cc:295</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a942f29030f08426e7e318204e987e2f7"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a942f29030f08426e7e318204e987e2f7">operations_research::GenericMinCostFlow::Solve</a></div><div class="ttdeci">bool Solve()</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00494">min_cost_flow.cc:494</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_a9dcd8610149406a1593d2a0725290482"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482">operations_research::GenericMinCostFlow::Capacity</a></div><div class="ttdeci">FlowQuantity Capacity(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00407">min_cost_flow.cc:407</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_aafd4139404e4f42af650481c3ff10cc7"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7">operations_research::GenericMinCostFlow::Supply</a></div><div class="ttdeci">FlowQuantity Supply(NodeIndex node) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00425">min_cost_flow.cc:425</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_ab7f4041c8667d63761aecb9657823945"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#ab7f4041c8667d63761aecb9657823945">operations_research::GenericMinCostFlow::SetArcUnitCost</a></div><div class="ttdeci">void SetArcUnitCost(ArcIndex arc, ArcScaledCostType unit_cost)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00101">min_cost_flow.cc:101</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_generic_min_cost_flow_html_aeb6622ffa760bc9403144736f8ac4ad4"><div class="ttname"><a href="classoperations__research_1_1_generic_min_cost_flow.html#aeb6622ffa760bc9403144736f8ac4ad4">operations_research::GenericMinCostFlow::SetArcCapacity</a></div><div class="ttdeci">void SetArcCapacity(ArcIndex arc, ArcFlowType new_capacity)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00111">min_cost_flow.cc:111</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_math_util_html_a5a6f14696b2a09c97b58e4f0989b19e7"><div class="ttname"><a href="classoperations__research_1_1_math_util.html#a5a6f14696b2a09c97b58e4f0989b19e7">operations_research::MathUtil::Abs</a></div><div class="ttdeci">static T Abs(const T x)</div><div class="ttdef"><b>Definition:</b> <a href="mathutil_8h_source.html#l00095">mathutil.h:95</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_max_flow_html"><div class="ttname"><a href="classoperations__research_1_1_max_flow.html">operations_research::MaxFlow</a></div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00652">max_flow.h:652</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_max_flow_status_class_html_a67a0db04d321a74b7e7fcfd3f1a3f70ba0e6873a155f86a4695f463bf8601d05f"><div class="ttname"><a href="classoperations__research_1_1_max_flow_status_class.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba0e6873a155f86a4695f463bf8601d05f">operations_research::MaxFlowStatusClass::NOT_SOLVED</a></div><div class="ttdeci">@ NOT_SOLVED</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00303">max_flow.h:303</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_max_flow_status_class_html_a67a0db04d321a74b7e7fcfd3f1a3f70ba2579881e7c83261bc21bafb5a5c92cad"><div class="ttname"><a href="classoperations__research_1_1_max_flow_status_class.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba2579881e7c83261bc21bafb5a5c92cad">operations_research::MaxFlowStatusClass::OPTIMAL</a></div><div class="ttdeci">@ OPTIMAL</div><div class="ttdef"><b>Definition:</b> <a href="max__flow_8h_source.html#l00304">max_flow.h:304</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_min_cost_flow_base_html_a67a0db04d321a74b7e7fcfd3f1a3f70b"><div class="ttname"><a href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70b">operations_research::MinCostFlowBase::Status</a></div><div class="ttdeci">Status</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00195">min_cost_flow.h:195</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_min_cost_flow_base_html_a67a0db04d321a74b7e7fcfd3f1a3f70ba0e6873a155f86a4695f463bf8601d05f"><div class="ttname"><a href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba0e6873a155f86a4695f463bf8601d05f">operations_research::MinCostFlowBase::NOT_SOLVED</a></div><div class="ttdeci">@ NOT_SOLVED</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00196">min_cost_flow.h:196</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_min_cost_flow_base_html_a67a0db04d321a74b7e7fcfd3f1a3f70ba2579881e7c83261bc21bafb5a5c92cad"><div class="ttname"><a href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba2579881e7c83261bc21bafb5a5c92cad">operations_research::MinCostFlowBase::OPTIMAL</a></div><div class="ttdeci">@ OPTIMAL</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00197">min_cost_flow.h:197</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_min_cost_flow_base_html_a67a0db04d321a74b7e7fcfd3f1a3f70ba2884fa43446c0cbc9c7a9b74d41d7483"><div class="ttname"><a href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba2884fa43446c0cbc9c7a9b74d41d7483">operations_research::MinCostFlowBase::INFEASIBLE</a></div><div class="ttdeci">@ INFEASIBLE</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00199">min_cost_flow.h:199</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_min_cost_flow_base_html_a67a0db04d321a74b7e7fcfd3f1a3f70ba6a2175a75814f119266396a0e9681718"><div class="ttname"><a href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70ba6a2175a75814f119266396a0e9681718">operations_research::MinCostFlowBase::UNBALANCED</a></div><div class="ttdeci">@ UNBALANCED</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00200">min_cost_flow.h:200</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_min_cost_flow_base_html_a67a0db04d321a74b7e7fcfd3f1a3f70bac76ecfd837bdc6d4150bb02c403356e4"><div class="ttname"><a href="classoperations__research_1_1_min_cost_flow_base.html#a67a0db04d321a74b7e7fcfd3f1a3f70bac76ecfd837bdc6d4150bb02c403356e4">operations_research::MinCostFlowBase::BAD_RESULT</a></div><div class="ttdeci">@ BAD_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8h_source.html#l00201">min_cost_flow.h:201</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a1057f1a98821c9237d75967b575f3829"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a1057f1a98821c9237d75967b575f3829">operations_research::SimpleMinCostFlow::UnitCost</a></div><div class="ttdeci">CostValue UnitCost(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01174">min_cost_flow.cc:1174</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a20e10ea36c32c30c5130f300f1ffde2e"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a20e10ea36c32c30c5130f300f1ffde2e">operations_research::SimpleMinCostFlow::AddArcWithCapacityAndUnitCost</a></div><div class="ttdeci">ArcIndex AddArcWithCapacityAndUnitCost(NodeIndex tail, NodeIndex head, FlowQuantity capacity, CostValue unit_cost)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01019">min_cost_flow.cc:1019</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a2a420ad8221c326064736ccf148d2f93"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a2a420ad8221c326064736ccf148d2f93">operations_research::SimpleMinCostFlow::Flow</a></div><div class="ttdeci">FlowQuantity Flow(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01158">min_cost_flow.cc:1158</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a3351fc1eb1dce4a7f6b937db874b5de1"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a3351fc1eb1dce4a7f6b937db874b5de1">operations_research::SimpleMinCostFlow::MaximumFlow</a></div><div class="ttdeci">FlowQuantity MaximumFlow() const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01156">min_cost_flow.cc:1156</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a3be0f6fcc44bc6a4a1e976c1e60b31d0"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a3be0f6fcc44bc6a4a1e976c1e60b31d0">operations_research::SimpleMinCostFlow::NumNodes</a></div><div class="ttdeci">NodeIndex NumNodes() const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01162">min_cost_flow.cc:1162</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a6d65a7ab08c98b332781f187776683e5"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a6d65a7ab08c98b332781f187776683e5">operations_research::SimpleMinCostFlow::SimpleMinCostFlow</a></div><div class="ttdeci">SimpleMinCostFlow(NodeIndex reserve_num_nodes=0, ArcIndex reserve_num_arcs=0)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l00999">min_cost_flow.cc:999</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a7898be8b7efbfe53a58fcf621cf41315"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a7898be8b7efbfe53a58fcf621cf41315">operations_research::SimpleMinCostFlow::NumArcs</a></div><div class="ttdeci">ArcIndex NumArcs() const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01164">min_cost_flow.cc:1164</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a7cd2dc0776a9f339b56ffac996a7df8c"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a7cd2dc0776a9f339b56ffac996a7df8c">operations_research::SimpleMinCostFlow::SetNodeSupply</a></div><div class="ttdeci">void SetNodeSupply(NodeIndex node, FlowQuantity supply)</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01014">min_cost_flow.cc:1014</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a8f17f2cebe15f0a8f2b072738093379d"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a8f17f2cebe15f0a8f2b072738093379d">operations_research::SimpleMinCostFlow::Tail</a></div><div class="ttdeci">NodeIndex Tail(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01166">min_cost_flow.cc:1166</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_a9dcd8610149406a1593d2a0725290482"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#a9dcd8610149406a1593d2a0725290482">operations_research::SimpleMinCostFlow::Capacity</a></div><div class="ttdeci">FlowQuantity Capacity(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01170">min_cost_flow.cc:1170</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_aafd4139404e4f42af650481c3ff10cc7"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#aafd4139404e4f42af650481c3ff10cc7">operations_research::SimpleMinCostFlow::Supply</a></div><div class="ttdeci">FlowQuantity Supply(NodeIndex node) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01178">min_cost_flow.cc:1178</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_acf6f87e72f7535b5dfe004740ef52a1d"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#acf6f87e72f7535b5dfe004740ef52a1d">operations_research::SimpleMinCostFlow::Head</a></div><div class="ttdeci">NodeIndex Head(ArcIndex arc) const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01168">min_cost_flow.cc:1168</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_simple_min_cost_flow_html_ad39ce7ee10c34a3ce1f69f179aa4f1e9"><div class="ttname"><a href="classoperations__research_1_1_simple_min_cost_flow.html#ad39ce7ee10c34a3ce1f69f179aa4f1e9">operations_research::SimpleMinCostFlow::OptimalCost</a></div><div class="ttdeci">CostValue OptimalCost() const</div><div class="ttdef"><b>Definition:</b> <a href="min__cost__flow_8cc_source.html#l01154">min_cost_flow.cc:1154</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_star_graph_base_html_a5237cfbb86ec8f305e498e873e5c4e95"><div class="ttname"><a href="classoperations__research_1_1_star_graph_base.html#a5237cfbb86ec8f305e498e873e5c4e95">operations_research::StarGraphBase::Head</a></div><div class="ttdeci">NodeIndexType Head(const ArcIndexType arc) const</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l00298">ebert_graph.h:298</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_z_vector_html_a6d0d87121f91870c74db35aa4edfdc69"><div class="ttname"><a href="classoperations__research_1_1_z_vector.html#a6d0d87121f91870c74db35aa4edfdc69">operations_research::ZVector::Reserve</a></div><div class="ttdeci">bool Reserve(int64_t new_min_index, int64_t new_max_index)</div><div class="ttdef"><b>Definition:</b> <a href="zvector_8h_source.html#l00098">zvector.h:98</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_z_vector_html_ad5721f29af64d2e2ae014ead96192591"><div class="ttname"><a href="classoperations__research_1_1_z_vector.html#ad5721f29af64d2e2ae014ead96192591">operations_research::ZVector::SetAll</a></div><div class="ttdeci">void SetAll(T value)</div><div class="ttdef"><b>Definition:</b> <a href="zvector_8h_source.html#l00133">zvector.h:133</a></div></div>
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<div class="ttc" id="aclassutil_1_1_reverse_arc_static_graph_html"><div class="ttname"><a href="classutil_1_1_reverse_arc_static_graph.html">util::ReverseArcStaticGraph</a></div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00550">graph.h:551</a></div></div>
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<div class="ttc" id="acommandlineflags_8h_html"><div class="ttname"><a href="commandlineflags_8h.html">commandlineflags.h</a></div></div>
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<div class="ttc" id="agraph_8h_html"><div class="ttname"><a href="graph_8h.html">graph.h</a></div></div>
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<div class="ttc" id="agraphs_8h_html"><div class="ttname"><a href="graphs_8h.html">graphs.h</a></div></div>
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<div class="ttc" id="agurobi__interface_8cc_html_a5f287b83a753915ae862fed64f8640a6"><div class="ttname"><a href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a></div><div class="ttdeci">GurobiMPCallbackContext * context</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__interface_8cc_source.html#l00514">gurobi_interface.cc:514</a></div></div>
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<div class="ttc" id="alocal__search_8cc_html_a30b5726116ac85ea64777e5d6e333894"><div class="ttname"><a href="local__search_8cc.html#a30b5726116ac85ea64777e5d6e333894">arc</a></div><div class="ttdeci">int arc</div><div class="ttdef"><b>Definition:</b> <a href="local__search_8cc_source.html#l02751">local_search.cc:2751</a></div></div>
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<div class="ttc" id="alocal__search_8cc_html_a750b5d744c39a06bfb13e6eb010e35d0"><div class="ttname"><a href="local__search_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a></div><div class="ttdeci">int index</div><div class="ttdef"><b>Definition:</b> <a href="local__search_8cc_source.html#l02750">local_search.cc:2750</a></div></div>
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<div class="ttc" id="amathutil_8h_html"><div class="ttname"><a href="mathutil_8h.html">mathutil.h</a></div></div>
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<div class="ttc" id="amax__flow_8h_html"><div class="ttname"><a href="max__flow_8h.html">max_flow.h</a></div></div>
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<div class="ttc" id="amin__cost__flow_8cc_html_ab29882272822b270edac48bc8b0ab14e"><div class="ttname"><a href="min__cost__flow_8cc.html#ab29882272822b270edac48bc8b0ab14e">ABSL_FLAG</a></div><div class="ttdeci">ABSL_FLAG(int64_t, min_cost_flow_alpha, 5, "Divide factor for epsilon at each refine step.")</div></div>
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<div class="ttc" id="amin__cost__flow_8h_html"><div class="ttname"><a href="min__cost__flow_8h.html">min_cost_flow.h</a></div></div>
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<div class="ttc" id="anamespaceabsl_html"><div class="ttname"><a href="namespaceabsl.html">absl</a></div><div class="ttdef"><b>Definition:</b> <a href="cleanup_8h_source.html#l00022">cleanup.h:22</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html"><div class="ttname"><a href="namespaceoperations__research.html">operations_research</a></div><div class="ttdoc">Collection of objects used to extend the Constraint Solver library.</div><div class="ttdef"><b>Definition:</b> <a href="dense__doubly__linked__list_8h_source.html#l00021">dense_doubly_linked_list.h:21</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html_a259d58fc853dd928f2148dbcf1ef25cd"><div class="ttname"><a href="namespaceoperations__research.html#a259d58fc853dd928f2148dbcf1ef25cd">operations_research::FlowQuantity</a></div><div class="ttdeci">int64_t FlowQuantity</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l00203">ebert_graph.h:203</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html_a7ae31ba4c3b4899478e53ca13df35dfc"><div class="ttname"><a href="namespaceoperations__research.html#a7ae31ba4c3b4899478e53ca13df35dfc">operations_research::NodeIndex</a></div><div class="ttdeci">int32_t NodeIndex</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l00201">ebert_graph.h:193</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html_aa0787bf78fb09d1e30f2451b5a68d4b8a6faaca695f728b47f47dd389f31e4a93"><div class="ttname"><a href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8a6faaca695f728b47f47dd389f31e4a93">operations_research::DimensionSchedulingStatus::INFEASIBLE</a></div><div class="ttdeci">@ INFEASIBLE</div></div>
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<div class="ttc" id="anamespaceoperations__research_html_aa0787bf78fb09d1e30f2451b5a68d4b8af00c8dbdd6e1f11bdae06be94277d293"><div class="ttname"><a href="namespaceoperations__research.html#aa0787bf78fb09d1e30f2451b5a68d4b8af00c8dbdd6e1f11bdae06be94277d293">operations_research::DimensionSchedulingStatus::OPTIMAL</a></div><div class="ttdeci">@ OPTIMAL</div></div>
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<div class="ttc" id="anamespaceoperations__research_html_aecf320bda6e95d1edaf3a546673e3e6b"><div class="ttname"><a href="namespaceoperations__research.html#aecf320bda6e95d1edaf3a546673e3e6b">operations_research::ArcIndex</a></div><div class="ttdeci">int32_t ArcIndex</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l00202">ebert_graph.h:202</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html_aee97ac67f280d35acdef2c5d461a85c3"><div class="ttname"><a href="namespaceoperations__research.html#aee97ac67f280d35acdef2c5d461a85c3">operations_research::CostValue</a></div><div class="ttdeci">int64_t CostValue</div><div class="ttdef"><b>Definition:</b> <a href="ebert__graph_8h_source.html#l00204">ebert_graph.h:204</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a2f76166dbe0c4055a1f256235ad00478"><div class="ttname"><a href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">util::Graph</a></div><div class="ttdeci">ListGraph Graph</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l02362">graph.h:2362</a></div></div>
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<div class="ttc" id="aresource_8cc_html_af12056bc2a8e3ec563f0940d87abbd2e"><div class="ttname"><a href="resource_8cc.html#af12056bc2a8e3ec563f0940d87abbd2e">delta</a></div><div class="ttdeci">int64_t delta</div><div class="ttdef"><b>Definition:</b> <a href="resource_8cc_source.html#l01694">resource.cc:1694</a></div></div>
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<div class="ttc" id="arouting__flow_8cc_html_a2acb49f4df5288066c43610bede123ec"><div class="ttname"><a href="routing__flow_8cc.html#a2acb49f4df5288066c43610bede123ec">capacity</a></div><div class="ttdeci">int64_t capacity</div><div class="ttdef"><b>Definition:</b> <a href="routing__flow_8cc_source.html#l00151">routing_flow.cc:151</a></div></div>
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<div class="ttc" id="arouting__flow_8cc_html_a64e7efc5529154ba56903e75f5300990"><div class="ttname"><a href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a></div><div class="ttdeci">int64_t tail</div><div class="ttdef"><b>Definition:</b> <a href="routing__flow_8cc_source.html#l00149">routing_flow.cc:149</a></div></div>
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<div class="ttc" id="arouting__flow_8cc_html_a75d7b5e4cab1e156cc7a2c5eba1e16f1"><div class="ttname"><a href="routing__flow_8cc.html#a75d7b5e4cab1e156cc7a2c5eba1e16f1">cost</a></div><div class="ttdeci">int64_t cost</div><div class="ttdef"><b>Definition:</b> <a href="routing__flow_8cc_source.html#l00152">routing_flow.cc:152</a></div></div>
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<div class="ttc" id="arouting__flow_8cc_html_afca32f65388659a4b0956496169488b4"><div class="ttname"><a href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a></div><div class="ttdeci">int64_t head</div><div class="ttdef"><b>Definition:</b> <a href="routing__flow_8cc_source.html#l00150">routing_flow.cc:150</a></div></div>
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<div class="ttc" id="astats_8h_html_a3c3e6b102f0d91c523099325c98e1887"><div class="ttname"><a href="stats_8h.html#a3c3e6b102f0d91c523099325c98e1887">IF_STATS_ENABLED</a></div><div class="ttdeci">#define IF_STATS_ENABLED(instructions)</div><div class="ttdef"><b>Definition:</b> <a href="stats_8h_source.html#l00437">stats.h:437</a></div></div>
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<div class="ttc" id="astats_8h_html_a9995704aaaf45fc21e08c847551a8d04"><div class="ttname"><a href="stats_8h.html#a9995704aaaf45fc21e08c847551a8d04">SCOPED_TIME_STAT</a></div><div class="ttdeci">#define SCOPED_TIME_STAT(stats)</div><div class="ttdef"><b>Definition:</b> <a href="stats_8h_source.html#l00438">stats.h:438</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1_graphs_html_a42fb6857e088a176a53232b910715260"><div class="ttname"><a href="structoperations__research_1_1_graphs.html#a42fb6857e088a176a53232b910715260">operations_research::Graphs::ArcReservation</a></div><div class="ttdeci">static ArcIndex ArcReservation(const Graph &graph)</div><div class="ttdef"><b>Definition:</b> <a href="graphs_8h_source.html#l00039">graphs.h:39</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1_graphs_html_a9d530d16efbea1a29d61cb0325980a50"><div class="ttname"><a href="structoperations__research_1_1_graphs.html#a9d530d16efbea1a29d61cb0325980a50">operations_research::Graphs::NodeReservation</a></div><div class="ttdeci">static NodeIndex NodeReservation(const Graph &graph)</div><div class="ttdef"><b>Definition:</b> <a href="graphs_8h_source.html#l00036">graphs.h:36</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1_graphs_html_ae02cd8602383e4fb48a8a933325db5fd"><div class="ttname"><a href="structoperations__research_1_1_graphs.html#ae02cd8602383e4fb48a8a933325db5fd">operations_research::Graphs::IsArcValid</a></div><div class="ttdeci">static bool IsArcValid(const Graph &graph, ArcIndex arc)</div><div class="ttdef"><b>Definition:</b> <a href="graphs_8h_source.html#l00033">graphs.h:33</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1_graphs_html_ae9cc106c6139c0b4e57057594bf56ea8"><div class="ttname"><a href="structoperations__research_1_1_graphs.html#ae9cc106c6139c0b4e57057594bf56ea8">operations_research::Graphs::OppositeArc</a></div><div class="ttdeci">static ArcIndex OppositeArc(const Graph &graph, ArcIndex arc)</div><div class="ttdef"><b>Definition:</b> <a href="graphs_8h_source.html#l00030">graphs.h:30</a></div></div>
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