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< a href = "knapsack__solver_8h.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 >
< 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 >
< 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 >
< 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 >
< div class = "line" > < a id = "l00005" name = "l00005" > < / a > < span class = "lineno" > 5< / span > < span class = "comment" > //< / span > < / div >
< 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 >
< div class = "line" > < a id = "l00007" name = "l00007" > < / a > < span class = "lineno" > 7< / span > < span class = "comment" > //< / span > < / div >
< 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 >
< 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 = "l00012" name = "l00012" > < / a > < span class = "lineno" > 12< / span > < span class = "comment" > // limitations under the License.< / span > < / div >
< div class = "line" > < a id = "l00013" name = "l00013" > < / a > < span class = "lineno" > 13< / span > < / div >
< div class = "line" > < a id = "l00014" name = "l00014" > < / a > < span class = "lineno" > 14< / span > < span class = "preprocessor" > #ifndef OR_TOOLS_ALGORITHMS_KNAPSACK_SOLVER_H_< / span > < / div >
< div class = "line" > < a id = "l00015" name = "l00015" > < / a > < span class = "lineno" > 15< / span > < span class = "preprocessor" > #define OR_TOOLS_ALGORITHMS_KNAPSACK_SOLVER_H_< / span > < / div >
< div class = "line" > < a id = "l00016" name = "l00016" > < / a > < span class = "lineno" > 16< / span > < / div >
< div class = "line" > < a id = "l00017" name = "l00017" > < / a > < span class = "lineno" > 17< / span > < span class = "preprocessor" > #include < math.h> < / span > < / div >
< div class = "line" > < a id = "l00018" name = "l00018" > < / a > < span class = "lineno" > 18< / span > < / div >
< div class = "line" > < a id = "l00019" name = "l00019" > < / a > < span class = "lineno" > 19< / span > < span class = "preprocessor" > #include < memory> < / span > < / div >
< div class = "line" > < a id = "l00020" name = "l00020" > < / a > < span class = "lineno" > 20< / span > < span class = "preprocessor" > #include < string> < / span > < / div >
< div class = "line" > < a id = "l00021" name = "l00021" > < / a > < span class = "lineno" > 21< / span > < span class = "preprocessor" > #include < vector> < / span > < / div >
< div class = "line" > < a id = "l00022" name = "l00022" > < / a > < span class = "lineno" > 22< / span > < / div >
< div class = "line" > < a id = "l00023" name = "l00023" > < / a > < span class = "lineno" > 23< / span > < span class = "preprocessor" > #include " absl/memory/memory.h" < / span > < / div >
< div class = "line" > < a id = "l00024" name = "l00024" > < / a > < span class = "lineno" > 24< / span > < span class = "preprocessor" > #include " ortools/base/basictypes.h" < / span > < / div >
< div class = "line" > < a id = "l00025" name = "l00025" > < / a > < span class = "lineno" > 25< / span > < span class = "preprocessor" > #include " ortools/base/integral_types.h" < / span > < / div >
< div class = "line" > < a id = "l00026" name = "l00026" > < / a > < span class = "lineno" > 26< / span > < span class = "preprocessor" > #include " ortools/base/logging.h" < / span > < / div >
< div class = "line" > < a id = "l00027" name = "l00027" > < / a > < span class = "lineno" > 27< / span > < span class = "preprocessor" > #include " ortools/base/macros.h" < / span > < / div >
< div class = "line" > < a id = "l00028" name = "l00028" > < / a > < span class = "lineno" > 28< / span > < span class = "preprocessor" > #include " ortools/util/time_limit.h" < / span > < / div >
< div class = "line" > < a id = "l00029" name = "l00029" > < / a > < span class = "lineno" > 29< / span > < / div >
< div class = "line" > < a id = "l00030" name = "l00030" > < / a > < span class = "lineno" > 30< / span > < span class = "keyword" > namespace < / span > < a class = "code hl_namespace" href = "namespaceoperations__research.html" > operations_research< / a > {< / div >
< div class = "line" > < a id = "l00031" name = "l00031" > < / a > < span class = "lineno" > 31< / span > < / div >
< div class = "line" > < a id = "l00032" name = "l00032" > < / a > < span class = "lineno" > 32< / span > < span class = "keyword" > class < / span > BaseKnapsackSolver;< / div >
< div class = "line" > < a id = "l00033" name = "l00033" > < / a > < span class = "lineno" > 33< / span > < / div >
< div class = "line" > < a id = "l00117" name = "l00117" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html" > 117< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_solver.html" > KnapsackSolver< / a > {< / div >
< div class = "line" > < a id = "l00118" name = "l00118" > < / a > < span class = "lineno" > 118< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00124" name = "l00124" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ec" > 124< / a > < / span > < span class = "keyword" > enum< / span > < a class = "code hl_enumeration" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ec" > SolverType< / a > {< / div >
< div class = "line" > < a id = "l00131" name = "l00131" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecac43056d6d2f96cee37fcb8a752b0ff45" > 131< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecac43056d6d2f96cee37fcb8a752b0ff45" > KNAPSACK_BRUTE_FORCE_SOLVER< / a > = 0,< / div >
< div class = "line" > < a id = "l00132" name = "l00132" > < / a > < span class = "lineno" > 132< / span > < / div >
< div class = "line" > < a id = "l00139" name = "l00139" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecaa020f211a1ff184e712aa4f372d6ea34" > 139< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecaa020f211a1ff184e712aa4f372d6ea34" > KNAPSACK_64ITEMS_SOLVER< / a > = 1,< / div >
< div class = "line" > < a id = "l00140" name = "l00140" > < / a > < span class = "lineno" > 140< / span > < / div >
< div class = "line" > < a id = "l00147" name = "l00147" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca793d998526508cfcc2bfc89fe25b3edd" > 147< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca793d998526508cfcc2bfc89fe25b3edd" > KNAPSACK_DYNAMIC_PROGRAMMING_SOLVER< / a > = 2,< / div >
< div class = "line" > < a id = "l00148" name = "l00148" > < / a > < span class = "lineno" > 148< / span > < / div >
< div class = "line" > < a id = "l00149" name = "l00149" > < / a > < span class = "lineno" > 149< / span > < span class = "preprocessor" > #if defined(USE_CBC)< / span > < / div >
< div class = "line" > < a id = "l00155" name = "l00155" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecae2ce6e36a247621de398e875d5feb575" > 155< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecae2ce6e36a247621de398e875d5feb575" > KNAPSACK_MULTIDIMENSION_CBC_MIP_SOLVER< / a > = 3,< / div >
< div class = "line" > < a id = "l00156" name = "l00156" > < / a > < span class = "lineno" > 156< / span > < span class = "preprocessor" > #endif < / span > < span class = "comment" > // USE_CBC< / span > < / div >
< div class = "line" > < a id = "l00157" name = "l00157" > < / a > < span class = "lineno" > 157< / span > < / div >
< div class = "line" > < a id = "l00163" name = "l00163" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca2a4e77eec4f386d17001e7285e812a0b" > 163< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca2a4e77eec4f386d17001e7285e812a0b" > KNAPSACK_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER< / a > = 5,< / div >
< div class = "line" > < a id = "l00164" name = "l00164" > < / a > < span class = "lineno" > 164< / span > < / div >
< div class = "line" > < a id = "l00165" name = "l00165" > < / a > < span class = "lineno" > 165< / span > < span class = "preprocessor" > #if defined(USE_SCIP)< / span > < / div >
< div class = "line" > < a id = "l00171" name = "l00171" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca1f4e1e2f80ab9c7d4fc1b14d9f5da959" > 171< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca1f4e1e2f80ab9c7d4fc1b14d9f5da959" > KNAPSACK_MULTIDIMENSION_SCIP_MIP_SOLVER< / a > = 6,< / div >
< div class = "line" > < a id = "l00172" name = "l00172" > < / a > < span class = "lineno" > 172< / span > < span class = "preprocessor" > #endif < / span > < span class = "comment" > // USE_SCIP< / span > < / div >
< div class = "line" > < a id = "l00173" name = "l00173" > < / a > < span class = "lineno" > 173< / span > < / div >
< div class = "line" > < a id = "l00174" name = "l00174" > < / a > < span class = "lineno" > 174< / span > < span class = "preprocessor" > #if defined(USE_XPRESS)< / span > < / div >
< div class = "line" > < a id = "l00180" name = "l00180" > < / a > < span class = "lineno" > 180< / span > KNAPSACK_MULTIDIMENSION_XPRESS_MIP_SOLVER = 7,< / div >
< div class = "line" > < a id = "l00181" name = "l00181" > < / a > < span class = "lineno" > 181< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00182" name = "l00182" > < / a > < span class = "lineno" > 182< / span > < / div >
< div class = "line" > < a id = "l00183" name = "l00183" > < / a > < span class = "lineno" > 183< / span > < span class = "preprocessor" > #if defined(USE_CPLEX)< / span > < / div >
< div class = "line" > < a id = "l00189" name = "l00189" > < / a > < span class = "lineno" > 189< / span > KNAPSACK_MULTIDIMENSION_CPLEX_MIP_SOLVER = 8,< / div >
< div class = "line" > < a id = "l00190" name = "l00190" > < / a > < span class = "lineno" > 190< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00198" name = "l00198" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca9d4c4118c9e4dc258e5052c0a457098d" > 198< / a > < / span > < a class = "code hl_enumvalue" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca9d4c4118c9e4dc258e5052c0a457098d" > KNAPSACK_DIVIDE_AND_CONQUER_SOLVER< / a > = 9,< / div >
< div class = "line" > < a id = "l00199" name = "l00199" > < / a > < span class = "lineno" > 199< / span > };< / div >
< div class = "line" > < a id = "l00200" name = "l00200" > < / a > < span class = "lineno" > 200< / span > < / div >
< div class = "line" > < a id = "l00201" name = "l00201" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a6b46c35c8977efde66ae7ad97423bdf2" > 201< / a > < / span > < span class = "keyword" > explicit< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a6b46c35c8977efde66ae7ad97423bdf2" > KnapsackSolver< / a > (< span class = "keyword" > const< / span > std::string& solver_name);< / div >
< div class = "line" > < a id = "l00202" name = "l00202" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a09627cf25401a9880d2e94551ecbf993" > 202< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a09627cf25401a9880d2e94551ecbf993" > KnapsackSolver< / a > (< a class = "code hl_enumeration" href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ec" > SolverType< / a > solver_type, < span class = "keyword" > const< / span > std::string& solver_name);< / div >
< div class = "line" > < a id = "l00203" name = "l00203" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#adecc1cf1fe064b843459dd1f8aec12ff" > 203< / a > < / span > < span class = "keyword" > virtual< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#adecc1cf1fe064b843459dd1f8aec12ff" > ~KnapsackSolver< / a > ();< / div >
< div class = "line" > < a id = "l00204" name = "l00204" > < / a > < span class = "lineno" > 204< / span > < / div >
< div class = "line" > < a id = "l00208" name = "l00208" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#ae5982edf1a2974495d20201775a765e2" > 208< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#ae5982edf1a2974495d20201775a765e2" > Init< / a > (< span class = "keyword" > const< / span > std::vector< int64_t> & profits,< / div >
< div class = "line" > < a id = "l00209" name = "l00209" > < / a > < span class = "lineno" > 209< / span > < span class = "keyword" > const< / span > std::vector< std::vector< int64_t> > & weights,< / div >
< div class = "line" > < a id = "l00210" name = "l00210" > < / a > < span class = "lineno" > 210< / span > < span class = "keyword" > const< / span > std::vector< int64_t> & capacities);< / div >
< div class = "line" > < a id = "l00211" name = "l00211" > < / a > < span class = "lineno" > 211< / span > < / div >
< div class = "line" > < a id = "l00215" name = "l00215" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a7f5467b49f2cba3d8804e44ed76e12a2" > 215< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a7f5467b49f2cba3d8804e44ed76e12a2" > Solve< / a > ();< / div >
< div class = "line" > < a id = "l00216" name = "l00216" > < / a > < span class = "lineno" > 216< / span > < / div >
< div class = "line" > < a id = "l00220" name = "l00220" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a57d88f584d14b161580550918c8fbf3b" > 220< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a57d88f584d14b161580550918c8fbf3b" > BestSolutionContains< / a > (< span class = "keywordtype" > int< / span > item_id) < span class = "keyword" > const< / span > ;< / div >
< div class = "line" > < a id = "l00224" name = "l00224" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a9647a5f765048e8662e5efa54c7d8687" > 224< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a9647a5f765048e8662e5efa54c7d8687" > IsSolutionOptimal< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > is_solution_optimal_; }< / div >
< div class = "line" > < a id = "l00225" name = "l00225" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a9a98946a64f3893b085f650932c9dfee" > 225< / a > < / span > std::string < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a9a98946a64f3893b085f650932c9dfee" > GetName< / a > () < span class = "keyword" > const< / span > ;< / div >
< div class = "line" > < a id = "l00226" name = "l00226" > < / a > < span class = "lineno" > 226< / span > < / div >
< div class = "line" > < a id = "l00227" name = "l00227" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#ac7d0a3efa2aabe6a3e667b0724f63688" > 227< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#ac7d0a3efa2aabe6a3e667b0724f63688" > use_reduction< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > use_reduction_; }< / div >
< div class = "line" > < a id = "l00228" name = "l00228" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#aa5b8e0a03c593bfc3cef0ba8d178844f" > 228< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#aa5b8e0a03c593bfc3cef0ba8d178844f" > set_use_reduction< / a > (< span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#ac7d0a3efa2aabe6a3e667b0724f63688" > use_reduction< / a > ) { use_reduction_ = < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#ac7d0a3efa2aabe6a3e667b0724f63688" > use_reduction< / a > ; }< / div >
< div class = "line" > < a id = "l00229" name = "l00229" > < / a > < span class = "lineno" > 229< / span > < / div >
< div class = "line" > < a id = "l00235" name = "l00235" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_solver.html#a6b4f6cbb00a64b0e9745938f9b99d0c8" > 235< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_solver.html#a6b4f6cbb00a64b0e9745938f9b99d0c8" > set_time_limit< / a > (< span class = "keywordtype" > double< / span > time_limit_seconds) {< / div >
< div class = "line" > < a id = "l00236" name = "l00236" > < / a > < span class = "lineno" > 236< / span > time_limit_seconds_ = time_limit_seconds;< / div >
< div class = "line" > < a id = "l00237" name = "l00237" > < / a > < span class = "lineno" > 237< / span > time_limit_ = absl::make_unique< TimeLimit> (time_limit_seconds_);< / div >
< div class = "line" > < a id = "l00238" name = "l00238" > < / a > < span class = "lineno" > 238< / span > }< / div >
< div class = "line" > < a id = "l00239" name = "l00239" > < / a > < span class = "lineno" > 239< / span > < / div >
< div class = "line" > < a id = "l00240" name = "l00240" > < / a > < span class = "lineno" > 240< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00241" name = "l00241" > < / a > < span class = "lineno" > 241< / span > < span class = "comment" > // Trivial reduction of capacity constraints when the capacity is higher than< / span > < / div >
< div class = "line" > < a id = "l00242" name = "l00242" > < / a > < span class = "lineno" > 242< / span > < span class = "comment" > // the sum of the weights of the items. Returns the number of reduced items.< / span > < / div >
< div class = "line" > < a id = "l00243" name = "l00243" > < / a > < span class = "lineno" > 243< / span > < span class = "keywordtype" > int< / span > ReduceCapacities(< span class = "keywordtype" > int< / span > num_items,< / div >
< div class = "line" > < a id = "l00244" name = "l00244" > < / a > < span class = "lineno" > 244< / span > < span class = "keyword" > const< / span > std::vector< std::vector< int64_t> > & weights,< / div >
< div class = "line" > < a id = "l00245" name = "l00245" > < / a > < span class = "lineno" > 245< / span > < span class = "keyword" > const< / span > std::vector< int64_t> & capacities,< / div >
< div class = "line" > < a id = "l00246" name = "l00246" > < / a > < span class = "lineno" > 246< / span > std::vector< std::vector< int64_t> > * reduced_weights,< / div >
< div class = "line" > < a id = "l00247" name = "l00247" > < / a > < span class = "lineno" > 247< / span > std::vector< int64_t> * reduced_capacities);< / div >
< div class = "line" > < a id = "l00248" name = "l00248" > < / a > < span class = "lineno" > 248< / span > < span class = "keywordtype" > int< / span > ReduceProblem(< span class = "keywordtype" > int< / span > num_items);< / div >
< div class = "line" > < a id = "l00249" name = "l00249" > < / a > < span class = "lineno" > 249< / span > < span class = "keywordtype" > void< / span > ComputeAdditionalProfit(< span class = "keyword" > const< / span > std::vector< int64_t> & profits);< / div >
< div class = "line" > < a id = "l00250" name = "l00250" > < / a > < span class = "lineno" > 250< / span > < span class = "keywordtype" > void< / span > InitReducedProblem(< span class = "keyword" > const< / span > std::vector< int64_t> & profits,< / div >
< div class = "line" > < a id = "l00251" name = "l00251" > < / a > < span class = "lineno" > 251< / span > < span class = "keyword" > const< / span > std::vector< std::vector< int64_t> > & weights,< / div >
< div class = "line" > < a id = "l00252" name = "l00252" > < / a > < span class = "lineno" > 252< / span > < span class = "keyword" > const< / span > std::vector< int64_t> & capacities);< / div >
< div class = "line" > < a id = "l00253" name = "l00253" > < / a > < span class = "lineno" > 253< / span > < / div >
< div class = "line" > < a id = "l00254" name = "l00254" > < / a > < span class = "lineno" > 254< / span > std::unique_ptr< BaseKnapsackSolver> solver_;< / div >
< div class = "line" > < a id = "l00255" name = "l00255" > < / a > < span class = "lineno" > 255< / span > std::vector< bool> known_value_;< / div >
< div class = "line" > < a id = "l00256" name = "l00256" > < / a > < span class = "lineno" > 256< / span > std::vector< bool> best_solution_;< / div >
< div class = "line" > < a id = "l00257" name = "l00257" > < / a > < span class = "lineno" > 257< / span > < span class = "keywordtype" > bool< / span > is_solution_optimal_ = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a id = "l00258" name = "l00258" > < / a > < span class = "lineno" > 258< / span > std::vector< int> mapping_reduced_item_id_;< / div >
< div class = "line" > < a id = "l00259" name = "l00259" > < / a > < span class = "lineno" > 259< / span > < span class = "keywordtype" > bool< / span > is_problem_solved_;< / div >
< div class = "line" > < a id = "l00260" name = "l00260" > < / a > < span class = "lineno" > 260< / span > int64_t additional_profit_;< / div >
< div class = "line" > < a id = "l00261" name = "l00261" > < / a > < span class = "lineno" > 261< / span > < span class = "keywordtype" > bool< / span > use_reduction_;< / div >
< div class = "line" > < a id = "l00262" name = "l00262" > < / a > < span class = "lineno" > 262< / span > < span class = "keywordtype" > double< / span > time_limit_seconds_;< / div >
< div class = "line" > < a id = "l00263" name = "l00263" > < / a > < span class = "lineno" > 263< / span > std::unique_ptr< TimeLimit> time_limit_;< / div >
< div class = "line" > < a id = "l00264" name = "l00264" > < / a > < span class = "lineno" > 264< / span > < / div >
< div class = "line" > < a id = "l00265" name = "l00265" > < / a > < span class = "lineno" > 265< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_class" href = "classoperations__research_1_1_knapsack_solver.html" > KnapsackSolver< / a > );< / div >
< div class = "line" > < a id = "l00266" name = "l00266" > < / a > < span class = "lineno" > 266< / span > };< / div >
< div class = "line" > < a id = "l00267" name = "l00267" > < / a > < span class = "lineno" > 267< / span > < / div >
< div class = "line" > < a id = "l00268" name = "l00268" > < / a > < span class = "lineno" > 268< / span > < span class = "preprocessor" > #if !defined(SWIG)< / span > < / div >
< div class = "line" > < a id = "l00269" name = "l00269" > < / a > < span class = "lineno" > 269< / span > < span class = "comment" > // The following code defines needed classes for the KnapsackGenericSolver< / span > < / div >
< div class = "line" > < a id = "l00270" name = "l00270" > < / a > < span class = "lineno" > 270< / span > < span class = "comment" > // class which is the entry point to extend knapsack with new constraints such< / span > < / div >
< div class = "line" > < a id = "l00271" name = "l00271" > < / a > < span class = "lineno" > 271< / span > < span class = "comment" > // as conflicts between items.< / span > < / div >
< div class = "line" > < a id = "l00272" name = "l00272" > < / a > < span class = "lineno" > 272< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00273" name = "l00273" > < / a > < span class = "lineno" > 273< / span > < span class = "comment" > // Constraints are enforced using KnapsackPropagator objects, in the current< / span > < / div >
< div class = "line" > < a id = "l00274" name = "l00274" > < / a > < span class = "lineno" > 274< / span > < span class = "comment" > // code there is one propagator per dimension (KnapsackCapacityPropagator).< / span > < / div >
< div class = "line" > < a id = "l00275" name = "l00275" > < / a > < span class = "lineno" > 275< / span > < span class = "comment" > // One of those propagators, named master propagator, is used to guide the< / span > < / div >
< div class = "line" > < a id = "l00276" name = "l00276" > < / a > < span class = "lineno" > 276< / span > < span class = "comment" > // search, i.e. decides which item should be assigned next.< / span > < / div >
< div class = "line" > < a id = "l00277" name = "l00277" > < / a > < span class = "lineno" > 277< / span > < span class = "comment" > // Roughly speaking the search algorithm is:< / span > < / div >
< div class = "line" > < a id = "l00278" name = "l00278" > < / a > < span class = "lineno" > 278< / span > < span class = "comment" > // - While not optimal< / span > < / div >
< div class = "line" > < a id = "l00279" name = "l00279" > < / a > < span class = "lineno" > 279< / span > < span class = "comment" > // - Select next search node to expand< / span > < / div >
< div class = "line" > < a id = "l00280" name = "l00280" > < / a > < span class = "lineno" > 280< / span > < span class = "comment" > // - Select next item_i to assign (using master propagator)< / span > < / div >
< div class = "line" > < a id = "l00281" name = "l00281" > < / a > < span class = "lineno" > 281< / span > < span class = "comment" > // - Generate a new search node where item_i is in the knapsack< / span > < / div >
< div class = "line" > < a id = "l00282" name = "l00282" > < / a > < span class = "lineno" > 282< / span > < span class = "comment" > // - Check validity of this new partial solution (using propagators)< / span > < / div >
< div class = "line" > < a id = "l00283" name = "l00283" > < / a > < span class = "lineno" > 283< / span > < span class = "comment" > // - If valid, add this new search node to the search< / span > < / div >
< div class = "line" > < a id = "l00284" name = "l00284" > < / a > < span class = "lineno" > 284< / span > < span class = "comment" > // - Generate a new search node where item_i is not in the knapsack< / span > < / div >
< div class = "line" > < a id = "l00285" name = "l00285" > < / a > < span class = "lineno" > 285< / span > < span class = "comment" > // - Check validity of this new partial solution (using propagators)< / span > < / div >
< div class = "line" > < a id = "l00286" name = "l00286" > < / a > < span class = "lineno" > 286< / span > < span class = "comment" > // - If valid, add this new search node to the search< / span > < / div >
< div class = "line" > < a id = "l00287" name = "l00287" > < / a > < span class = "lineno" > 287< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00288" name = "l00288" > < / a > < span class = "lineno" > 288< / span > < span class = "comment" > // TODO(user): Add a new propagator class for conflict constraint.< / span > < / div >
< div class = "line" > < a id = "l00289" name = "l00289" > < / a > < span class = "lineno" > 289< / span > < span class = "comment" > // TODO(user): Add a new propagator class used as a guide when the problem has< / span > < / div >
< div class = "line" > < a id = "l00290" name = "l00290" > < / a > < span class = "lineno" > 290< / span > < span class = "comment" > // several dimensions.< / span > < / div >
< 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 > < span class = "comment" > // ----- KnapsackAssignment -----< / span > < / div >
< div class = "line" > < a id = "l00293" name = "l00293" > < / a > < span class = "lineno" > 293< / span > < span class = "comment" > // KnapsackAssignment is a small struct used to pair an item with its< / span > < / div >
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< div class = "line" > < a id = "l00294" name = "l00294" > < / a > < span class = "lineno" > 294< / span > < span class = "comment" > // assignment. It is mainly used for search nodes and updates.< / span > < / div >
< div class = "line" > < a id = "l00295" name = "l00295" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_assignment.html" > 295< / a > < / span > < span class = "keyword" > struct < / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > {< / div >
< div class = "line" > < a id = "l00296" name = "l00296" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_assignment.html#a8f85eb172a4c6bed0d042f7d269fc457" > 296< / a > < / span > < a class = "code hl_function" href = "structoperations__research_1_1_knapsack_assignment.html#a8f85eb172a4c6bed0d042f7d269fc457" > KnapsackAssignment< / a > (< span class = "keywordtype" > int< / span > _item_id, < span class = "keywordtype" > bool< / span > _is_in)< / div >
< div class = "line" > < a id = "l00297" name = "l00297" > < / a > < span class = "lineno" > 297< / span > : < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_assignment.html#a1c0c3c835f3c4363b650fba65c7ebf32" > item_id< / a > (_item_id), < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_assignment.html#a922620900c7a18d22de686d47e25d4ed" > is_in< / a > (_is_in) {}< / div >
< div class = "line" > < a id = "l00298" name = "l00298" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_assignment.html#a1c0c3c835f3c4363b650fba65c7ebf32" > 298< / a > < / span > < span class = "keywordtype" > int< / span > < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_assignment.html#a1c0c3c835f3c4363b650fba65c7ebf32" > item_id< / a > ;< / div >
< div class = "line" > < a id = "l00299" name = "l00299" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_assignment.html#a922620900c7a18d22de686d47e25d4ed" > 299< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_assignment.html#a922620900c7a18d22de686d47e25d4ed" > is_in< / a > ;< / div >
< div class = "line" > < a id = "l00300" name = "l00300" > < / a > < span class = "lineno" > 300< / span > };< / div >
< div class = "line" > < a id = "l00301" name = "l00301" > < / a > < span class = "lineno" > 301< / span > < / div >
< div class = "line" > < a id = "l00302" name = "l00302" > < / a > < span class = "lineno" > 302< / span > < span class = "comment" > // ----- KnapsackItem -----< / span > < / div >
< div class = "line" > < a id = "l00303" name = "l00303" > < / a > < span class = "lineno" > 303< / span > < span class = "comment" > // KnapsackItem is a small struct to pair an item weight with its< / span > < / div >
< div class = "line" > < a id = "l00304" name = "l00304" > < / a > < span class = "lineno" > 304< / span > < span class = "comment" > // corresponding profit.< / span > < / div >
< div class = "line" > < a id = "l00305" name = "l00305" > < / a > < span class = "lineno" > 305< / span > < span class = "comment" > // The aim of the knapsack problem is to pack as many valuable items as< / span > < / div >
< div class = "line" > < a id = "l00306" name = "l00306" > < / a > < span class = "lineno" > 306< / span > < span class = "comment" > // possible. A straight forward heuristic is to take those with the greatest< / span > < / div >
< div class = "line" > < a id = "l00307" name = "l00307" > < / a > < span class = "lineno" > 307< / span > < span class = "comment" > // profit-per-unit-weight. This ratio is called efficiency in this< / span > < / div >
< div class = "line" > < a id = "l00308" name = "l00308" > < / a > < span class = "lineno" > 308< / span > < span class = "comment" > // implementation. So items will be grouped in vectors, and sorted by< / span > < / div >
< div class = "line" > < a id = "l00309" name = "l00309" > < / a > < span class = "lineno" > 309< / span > < span class = "comment" > // decreasing efficiency.< / span > < / div >
< div class = "line" > < a id = "l00310" name = "l00310" > < / a > < span class = "lineno" > 310< / span > < span class = "comment" > // Note that profits are duplicated for each dimension. This is done to< / span > < / div >
< div class = "line" > < a id = "l00311" name = "l00311" > < / a > < span class = "lineno" > 311< / span > < span class = "comment" > // simplify the code, especially the GetEfficiency method and vector sorting.< / span > < / div >
< div class = "line" > < a id = "l00312" name = "l00312" > < / a > < span class = "lineno" > 312< / span > < span class = "comment" > // As there usually are only few dimensions, the overhead should not be an< / span > < / div >
< div class = "line" > < a id = "l00313" name = "l00313" > < / a > < span class = "lineno" > 313< / span > < span class = "comment" > // issue.< / span > < / div >
< div class = "line" > < a id = "l00314" name = "l00314" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_item.html" > 314< / a > < / span > < span class = "keyword" > struct < / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_item.html" > KnapsackItem< / a > {< / div >
< div class = "line" > < a id = "l00315" name = "l00315" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_item.html#aefc8a61c2edd00c4daf37056b754e6a0" > 315< / a > < / span > < a class = "code hl_function" href = "structoperations__research_1_1_knapsack_item.html#aefc8a61c2edd00c4daf37056b754e6a0" > KnapsackItem< / a > (< span class = "keywordtype" > int< / span > _id, int64_t _weight, int64_t _profit)< / div >
< div class = "line" > < a id = "l00316" name = "l00316" > < / a > < span class = "lineno" > 316< / span > : < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a64ae40793ade89d800a8c5646d2980fc" > id< / a > (_id), < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a523234416a08d890505d4b34fb0513ee" > weight< / a > (_weight), < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a75dd99d0e31e3a347e5ebad01561e31d" > profit< / a > (_profit) {}< / div >
< div class = "line" > < a id = "l00317" name = "l00317" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_item.html#a7eb6bbc72ec605de6f50d0c90f609a85" > 317< / a > < / span > < span class = "keywordtype" > double< / span > < a class = "code hl_function" href = "structoperations__research_1_1_knapsack_item.html#a7eb6bbc72ec605de6f50d0c90f609a85" > GetEfficiency< / a > (int64_t profit_max)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a id = "l00318" name = "l00318" > < / a > < span class = "lineno" > 318< / span > < span class = "keywordflow" > return< / span > (< a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a523234416a08d890505d4b34fb0513ee" > weight< / a > > 0)< / div >
< div class = "line" > < a id = "l00319" name = "l00319" > < / a > < span class = "lineno" > 319< / span > ? < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > double< / span > < span class = "keyword" > > < / span > (< a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a75dd99d0e31e3a347e5ebad01561e31d" > profit< / a > ) / < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > double< / span > < span class = "keyword" > > < / span > (< a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a523234416a08d890505d4b34fb0513ee" > weight< / a > )< / div >
< div class = "line" > < a id = "l00320" name = "l00320" > < / a > < span class = "lineno" > 320< / span > : < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > double< / span > < span class = "keyword" > > < / span > (profit_max);< / div >
< div class = "line" > < a id = "l00321" name = "l00321" > < / a > < span class = "lineno" > 321< / span > }< / div >
< div class = "line" > < a id = "l00322" name = "l00322" > < / a > < span class = "lineno" > 322< / span > < / div >
< div class = "line" > < a id = "l00323" name = "l00323" > < / a > < span class = "lineno" > 323< / span > < span class = "comment" > // The ' id' field is used to retrieve the initial item in order to< / span > < / div >
< div class = "line" > < a id = "l00324" name = "l00324" > < / a > < span class = "lineno" > 324< / span > < span class = "comment" > // communicate with other propagators and state.< / span > < / div >
< div class = "line" > < a id = "l00325" name = "l00325" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_item.html#a64ae40793ade89d800a8c5646d2980fc" > 325< / a > < / span > < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a64ae40793ade89d800a8c5646d2980fc" > id< / a > ;< / div >
< div class = "line" > < a id = "l00326" name = "l00326" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_item.html#a523234416a08d890505d4b34fb0513ee" > 326< / a > < / span > < span class = "keyword" > const< / span > int64_t < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a523234416a08d890505d4b34fb0513ee" > weight< / a > ;< / div >
< div class = "line" > < a id = "l00327" name = "l00327" > < / a > < span class = "lineno" > < a class = "line" href = "structoperations__research_1_1_knapsack_item.html#a75dd99d0e31e3a347e5ebad01561e31d" > 327< / a > < / span > < span class = "keyword" > const< / span > int64_t < a class = "code hl_variable" href = "structoperations__research_1_1_knapsack_item.html#a75dd99d0e31e3a347e5ebad01561e31d" > profit< / a > ;< / div >
< div class = "line" > < a id = "l00328" name = "l00328" > < / a > < span class = "lineno" > 328< / span > };< / div >
< div class = "line" > < a id = "l00329" name = "l00329" > < / a > < span class = "lineno" > < a class = "line" href = "namespaceoperations__research.html#ada7d9b46f657c6053a197273a85043a7" > 329< / a > < / span > < span class = "keyword" > typedef< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_item.html" > KnapsackItem< / a > * < a class = "code hl_typedef" href = "namespaceoperations__research.html#ada7d9b46f657c6053a197273a85043a7" > KnapsackItemPtr< / a > ;< / div >
< div class = "line" > < a id = "l00330" name = "l00330" > < / a > < span class = "lineno" > 330< / span > < / div >
< div class = "line" > < a id = "l00331" name = "l00331" > < / a > < span class = "lineno" > 331< / span > < span class = "comment" > // ----- KnapsackSearchNode -----< / span > < / div >
< div class = "line" > < a id = "l00332" name = "l00332" > < / a > < span class = "lineno" > 332< / span > < span class = "comment" > // KnapsackSearchNode is a class used to describe a decision in the decision< / span > < / div >
< div class = "line" > < a id = "l00333" name = "l00333" > < / a > < span class = "lineno" > 333< / span > < span class = "comment" > // search tree.< / span > < / div >
< div class = "line" > < a id = "l00334" name = "l00334" > < / a > < span class = "lineno" > 334< / span > < span class = "comment" > // The node is defined by a pointer to the parent search node and an< / span > < / div >
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< div class = "line" > < a id = "l00335" name = "l00335" > < / a > < span class = "lineno" > 335< / span > < span class = "comment" > // assignment (see KnapsackAssignment).< / span > < / div >
2022-01-17 21:42:14 +01:00
< div class = "line" > < a id = "l00336" name = "l00336" > < / a > < span class = "lineno" > 336< / span > < span class = "comment" > // As the current state is not explicitly stored in a search node, one should< / span > < / div >
< div class = "line" > < a id = "l00337" name = "l00337" > < / a > < span class = "lineno" > 337< / span > < span class = "comment" > // go through the search tree to incrementally build a partial solution from< / span > < / div >
< div class = "line" > < a id = "l00338" name = "l00338" > < / a > < span class = "lineno" > 338< / span > < span class = "comment" > // a previous search node.< / span > < / div >
< div class = "line" > < a id = "l00339" name = "l00339" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html" > 339< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > {< / div >
< div class = "line" > < a id = "l00340" name = "l00340" > < / a > < span class = "lineno" > 340< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00341" name = "l00341" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#ad17e46a2afcf393a4ec9159162c969f2" > 341< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#ad17e46a2afcf393a4ec9159162c969f2" > KnapsackSearchNode< / a > (< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > * < span class = "keyword" > const< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a94edd193a3f600c604a314803f723d93" > parent< / a > ,< / div >
< div class = "line" > < a id = "l00342" name = "l00342" > < / a > < span class = "lineno" > 342< / span > < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#af94db7bbd58faf999d63953ef12784fe" > assignment< / a > );< / div >
< div class = "line" > < a id = "l00343" name = "l00343" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#a6fdd73f8011695b97659f2bea29325cb" > 343< / a > < / span > < span class = "keywordtype" > int< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a6fdd73f8011695b97659f2bea29325cb" > depth< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > depth_; }< / div >
< div class = "line" > < a id = "l00344" name = "l00344" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#a94edd193a3f600c604a314803f723d93" > 344< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > * < span class = "keyword" > const< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a94edd193a3f600c604a314803f723d93" > parent< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > parent_; }< / div >
< div class = "line" > < a id = "l00345" name = "l00345" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#af94db7bbd58faf999d63953ef12784fe" > 345< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#af94db7bbd58faf999d63953ef12784fe" > assignment< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > assignment_; }< / div >
< div class = "line" > < a id = "l00346" name = "l00346" > < / a > < span class = "lineno" > 346< / span > < / div >
< div class = "line" > < a id = "l00347" name = "l00347" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#a08beea2d857241d99287935a91be5217" > 347< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a08beea2d857241d99287935a91be5217" > current_profit< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > current_profit_; }< / div >
< div class = "line" > < a id = "l00348" name = "l00348" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#a48521e7b1a381bd3f3f452fa6e697bde" > 348< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a48521e7b1a381bd3f3f452fa6e697bde" > set_current_profit< / a > (int64_t profit) { current_profit_ = profit; }< / div >
< div class = "line" > < a id = "l00349" name = "l00349" > < / a > < span class = "lineno" > 349< / span > < / div >
< div class = "line" > < a id = "l00350" name = "l00350" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#aa68069fd1180cb37fcdbc99d6230bc3e" > 350< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#aa68069fd1180cb37fcdbc99d6230bc3e" > profit_upper_bound< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > profit_upper_bound_; }< / div >
< div class = "line" > < a id = "l00351" name = "l00351" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#af991b29f273c53c8b35cb09bcccf3a5d" > 351< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#af991b29f273c53c8b35cb09bcccf3a5d" > set_profit_upper_bound< / a > (int64_t profit) { profit_upper_bound_ = profit; }< / div >
< div class = "line" > < a id = "l00352" name = "l00352" > < / a > < span class = "lineno" > 352< / span > < / div >
< div class = "line" > < a id = "l00353" name = "l00353" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#a94dca4e57f87ba2a9e3b995c267c0821" > 353< / a > < / span > < span class = "keywordtype" > int< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a94dca4e57f87ba2a9e3b995c267c0821" > next_item_id< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > next_item_id_; }< / div >
< div class = "line" > < a id = "l00354" name = "l00354" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_node.html#a9962698a737cd21789c77ff32bef0d98" > 354< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_node.html#a9962698a737cd21789c77ff32bef0d98" > set_next_item_id< / a > (< span class = "keywordtype" > int< / span > < span class = "keywordtype" > id< / span > ) { next_item_id_ = id; }< / div >
< div class = "line" > < a id = "l00355" name = "l00355" > < / a > < span class = "lineno" > 355< / span > < / div >
< div class = "line" > < a id = "l00356" name = "l00356" > < / a > < span class = "lineno" > 356< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00357" name = "l00357" > < / a > < span class = "lineno" > 357< / span > < span class = "comment" > // ' depth' field is used to navigate efficiently through the search tree< / span > < / div >
< div class = "line" > < a id = "l00358" name = "l00358" > < / a > < span class = "lineno" > 358< / span > < span class = "comment" > // (see KnapsackSearchPath).< / span > < / div >
< div class = "line" > < a id = "l00359" name = "l00359" > < / a > < span class = "lineno" > 359< / span > < span class = "keywordtype" > int< / span > depth_;< / div >
< div class = "line" > < a id = "l00360" name = "l00360" > < / a > < span class = "lineno" > 360< / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > * < span class = "keyword" > const< / span > parent_;< / div >
< div class = "line" > < a id = "l00361" name = "l00361" > < / a > < span class = "lineno" > 361< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > assignment_;< / div >
< div class = "line" > < a id = "l00362" name = "l00362" > < / a > < span class = "lineno" > 362< / span > < / div >
< div class = "line" > < a id = "l00363" name = "l00363" > < / a > < span class = "lineno" > 363< / span > < span class = "comment" > // ' current_profit' and ' profit_upper_bound' fields are used to sort search< / span > < / div >
< div class = "line" > < a id = "l00364" name = "l00364" > < / a > < span class = "lineno" > 364< / span > < span class = "comment" > // nodes using a priority queue. That allows to pop the node with the best< / span > < / div >
< div class = "line" > < a id = "l00365" name = "l00365" > < / a > < span class = "lineno" > 365< / span > < span class = "comment" > // upper bound, and more importantly to stop the search when optimality is< / span > < / div >
< div class = "line" > < a id = "l00366" name = "l00366" > < / a > < span class = "lineno" > 366< / span > < span class = "comment" > // proved.< / span > < / div >
< div class = "line" > < a id = "l00367" name = "l00367" > < / a > < span class = "lineno" > 367< / span > int64_t current_profit_;< / div >
< div class = "line" > < a id = "l00368" name = "l00368" > < / a > < span class = "lineno" > 368< / span > int64_t profit_upper_bound_;< / div >
< div class = "line" > < a id = "l00369" name = "l00369" > < / a > < span class = "lineno" > 369< / span > < / div >
< div class = "line" > < a id = "l00370" name = "l00370" > < / a > < span class = "lineno" > 370< / span > < span class = "comment" > // ' next_item_id' field allows to avoid an O(number_of_items) scan to find< / span > < / div >
< div class = "line" > < a id = "l00371" name = "l00371" > < / a > < span class = "lineno" > 371< / span > < span class = "comment" > // next item to select. This is done for free by the upper bound computation.< / span > < / div >
< div class = "line" > < a id = "l00372" name = "l00372" > < / a > < span class = "lineno" > 372< / span > < span class = "keywordtype" > int< / span > next_item_id_;< / div >
< div class = "line" > < a id = "l00373" name = "l00373" > < / a > < span class = "lineno" > 373< / span > < / div >
< div class = "line" > < a id = "l00374" name = "l00374" > < / a > < span class = "lineno" > 374< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > );< / div >
< div class = "line" > < a id = "l00375" name = "l00375" > < / a > < span class = "lineno" > 375< / span > };< / div >
< div class = "line" > < a id = "l00376" name = "l00376" > < / a > < span class = "lineno" > 376< / span > < / div >
< div class = "line" > < a id = "l00377" name = "l00377" > < / a > < span class = "lineno" > 377< / span > < span class = "comment" > // ----- KnapsackSearchPath -----< / span > < / div >
< div class = "line" > < a id = "l00378" name = "l00378" > < / a > < span class = "lineno" > 378< / span > < span class = "comment" > // KnapsackSearchPath is a small class used to represent the path between a< / span > < / div >
< div class = "line" > < a id = "l00379" name = "l00379" > < / a > < span class = "lineno" > 379< / span > < span class = "comment" > // node to another node in the search tree.< / span > < / div >
< div class = "line" > < a id = "l00380" name = "l00380" > < / a > < span class = "lineno" > 380< / span > < span class = "comment" > // As the solution state is not stored for each search node, the state should< / span > < / div >
< div class = "line" > < a id = "l00381" name = "l00381" > < / a > < span class = "lineno" > 381< / span > < span class = "comment" > // be rebuilt at each node. One simple solution is to apply all decisions< / span > < / div >
< div class = "line" > < a id = "l00382" name = "l00382" > < / a > < span class = "lineno" > 382< / span > < span class = "comment" > // between the node ' to' and the root. This can be computed in< / span > < / div >
< div class = "line" > < a id = "l00383" name = "l00383" > < / a > < span class = "lineno" > 383< / span > < span class = "comment" > // O(number_of_items).< / span > < / div >
< div class = "line" > < a id = "l00384" name = "l00384" > < / a > < span class = "lineno" > 384< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00385" name = "l00385" > < / a > < span class = "lineno" > 385< / span > < span class = "comment" > // However, it is possible to achieve better average complexity. Two< / span > < / div >
< div class = "line" > < a id = "l00386" name = "l00386" > < / a > < span class = "lineno" > 386< / span > < span class = "comment" > // consecutively explored nodes are usually close enough (i.e., much less than< / span > < / div >
< div class = "line" > < a id = "l00387" name = "l00387" > < / a > < span class = "lineno" > 387< / span > < span class = "comment" > // number_of_items) to benefit from an incremental update from the node< / span > < / div >
< div class = "line" > < a id = "l00388" name = "l00388" > < / a > < span class = "lineno" > 388< / span > < span class = "comment" > // ' from' to the node ' to' .< / span > < / div >
< div class = "line" > < a id = "l00389" name = "l00389" > < / a > < span class = "lineno" > 389< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00390" name = "l00390" > < / a > < span class = "lineno" > 390< / span > < span class = "comment" > // The ' via' field is the common parent of ' from' field and ' to' field.< / span > < / div >
< div class = "line" > < a id = "l00391" name = "l00391" > < / a > < span class = "lineno" > 391< / span > < span class = "comment" > // So the state can be built by reverting all decisions from ' from' to ' via' < / span > < / div >
< div class = "line" > < a id = "l00392" name = "l00392" > < / a > < span class = "lineno" > 392< / span > < span class = "comment" > // and then applying all decisions from ' via' to ' to' .< / span > < / div >
< div class = "line" > < a id = "l00393" name = "l00393" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html" > 393< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_path.html" > KnapsackSearchPath< / a > {< / div >
< div class = "line" > < a id = "l00394" name = "l00394" > < / a > < span class = "lineno" > 394< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00395" name = "l00395" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html#a3dc3602e1a640bc986956e0ce5e88d04" > 395< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#a3dc3602e1a640bc986956e0ce5e88d04" > KnapsackSearchPath< / a > (< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#a97db8ba091791787900dd812fefc10e5" > from< / a > ,< / div >
< div class = "line" > < a id = "l00396" name = "l00396" > < / a > < span class = "lineno" > 396< / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#ad0e1cf5e8520cb7a59cad8d6aecdf8a6" > to< / a > );< / div >
< div class = "line" > < a id = "l00397" name = "l00397" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html#a1e3b6d38df0786ccf7f938d60e386aae" > 397< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#a1e3b6d38df0786ccf7f938d60e386aae" > Init< / a > ();< / div >
< div class = "line" > < a id = "l00398" name = "l00398" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html#a97db8ba091791787900dd812fefc10e5" > 398< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#a97db8ba091791787900dd812fefc10e5" > from< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > from_; }< / div >
< div class = "line" > < a id = "l00399" name = "l00399" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html#ab54cc176a72a1a03b18cb3f9649c773a" > 399< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#ab54cc176a72a1a03b18cb3f9649c773a" > via< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > *via_; }< / div >
< div class = "line" > < a id = "l00400" name = "l00400" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html#ad0e1cf5e8520cb7a59cad8d6aecdf8a6" > 400< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#ad0e1cf5e8520cb7a59cad8d6aecdf8a6" > to< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > to_; }< / div >
< div class = "line" > < a id = "l00401" name = "l00401" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_search_path.html#a09f219a2226f7c0de0f50b6f00c099e3" > 401< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > * < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_search_path.html#a09f219a2226f7c0de0f50b6f00c099e3" > MoveUpToDepth< / a > (< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & node,< / div >
< div class = "line" > < a id = "l00402" name = "l00402" > < / a > < span class = "lineno" > 402< / span > < span class = "keywordtype" > int< / span > depth) < span class = "keyword" > const< / span > ;< / div >
< div class = "line" > < a id = "l00403" name = "l00403" > < / a > < span class = "lineno" > 403< / span > < / div >
< div class = "line" > < a id = "l00404" name = "l00404" > < / a > < span class = "lineno" > 404< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00405" name = "l00405" > < / a > < span class = "lineno" > 405< / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & from_;< / div >
< div class = "line" > < a id = "l00406" name = "l00406" > < / a > < span class = "lineno" > 406< / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > * via_; < span class = "comment" > // Computed in ' Init' .< / span > < / div >
< div class = "line" > < a id = "l00407" name = "l00407" > < / a > < span class = "lineno" > 407< / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & to_;< / div >
< div class = "line" > < a id = "l00408" name = "l00408" > < / a > < span class = "lineno" > 408< / span > < / div >
< div class = "line" > < a id = "l00409" name = "l00409" > < / a > < span class = "lineno" > 409< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_path.html" > KnapsackSearchPath< / a > );< / div >
< div class = "line" > < a id = "l00410" name = "l00410" > < / a > < span class = "lineno" > 410< / span > };< / div >
< div class = "line" > < a id = "l00411" name = "l00411" > < / a > < span class = "lineno" > 411< / span > < / div >
< div class = "line" > < a id = "l00412" name = "l00412" > < / a > < span class = "lineno" > 412< / span > < span class = "comment" > // ----- KnapsackState -----< / span > < / div >
< div class = "line" > < a id = "l00413" name = "l00413" > < / a > < span class = "lineno" > 413< / span > < span class = "comment" > // KnapsackState represents a partial solution to the knapsack problem.< / span > < / div >
< div class = "line" > < a id = "l00414" name = "l00414" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html" > 414< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_state.html" > KnapsackState< / a > {< / div >
< div class = "line" > < a id = "l00415" name = "l00415" > < / a > < span class = "lineno" > 415< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00416" name = "l00416" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html#a41f9430cc0090383e7797a88c1dbacbc" > 416< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#a41f9430cc0090383e7797a88c1dbacbc" > KnapsackState< / a > ();< / div >
< div class = "line" > < a id = "l00417" name = "l00417" > < / a > < span class = "lineno" > 417< / span > < / div >
< div class = "line" > < a id = "l00418" name = "l00418" > < / a > < span class = "lineno" > 418< / span > < span class = "comment" > // Initializes vectors with number_of_items set to false (i.e. not bound yet).< / span > < / div >
< div class = "line" > < a id = "l00419" name = "l00419" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html#a6308c7a97200f84f6ebf5b2c487b0362" > 419< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#a6308c7a97200f84f6ebf5b2c487b0362" > Init< / a > (< span class = "keywordtype" > int< / span > number_of_items);< / div >
< div class = "line" > < a id = "l00420" name = "l00420" > < / a > < span class = "lineno" > 420< / span > < span class = "comment" > // Updates the state by applying or reverting a decision.< / span > < / div >
< div class = "line" > < a id = "l00421" name = "l00421" > < / a > < span class = "lineno" > 421< / span > < span class = "comment" > // Returns false if fails, i.e. trying to apply an inconsistent decision< / span > < / div >
< div class = "line" > < a id = "l00422" name = "l00422" > < / a > < span class = "lineno" > 422< / span > < span class = "comment" > // to an already assigned item.< / span > < / div >
< div class = "line" > < a id = "l00423" name = "l00423" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html#ab771ac0e538f991b73b011ee3ba11f05" > 423< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#ab771ac0e538f991b73b011ee3ba11f05" > UpdateState< / a > (< span class = "keywordtype" > bool< / span > revert, < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & assignment);< / div >
< div class = "line" > < a id = "l00424" name = "l00424" > < / a > < span class = "lineno" > 424< / span > < / div >
< div class = "line" > < a id = "l00425" name = "l00425" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html#a5c677592ee5e7312c64475ebae949eab" > 425< / a > < / span > < span class = "keywordtype" > int< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#a5c677592ee5e7312c64475ebae949eab" > GetNumberOfItems< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > is_bound_.size(); }< / div >
< div class = "line" > < a id = "l00426" name = "l00426" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html#a89aa280d2321c1316aa1305106f1bb49" > 426< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#a89aa280d2321c1316aa1305106f1bb49" > is_bound< / a > (< span class = "keywordtype" > int< / span > < span class = "keywordtype" > id< / span > )< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > is_bound_.at(< span class = "keywordtype" > id< / span > ); }< / div >
< div class = "line" > < a id = "l00427" name = "l00427" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_state.html#a862bf4e908cd82ea44f72e98558016ad" > 427< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#a862bf4e908cd82ea44f72e98558016ad" > is_in< / a > (< span class = "keywordtype" > int< / span > < span class = "keywordtype" > id< / span > )< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > is_in_.at(< span class = "keywordtype" > id< / span > ); }< / div >
< div class = "line" > < a id = "l00428" name = "l00428" > < / a > < span class = "lineno" > 428< / span > < / div >
< div class = "line" > < a id = "l00429" name = "l00429" > < / a > < span class = "lineno" > 429< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00430" name = "l00430" > < / a > < span class = "lineno" > 430< / span > < span class = "comment" > // Vectors ' is_bound_' and ' is_in_' contain a boolean value for each item.< / span > < / div >
< div class = "line" > < a id = "l00431" name = "l00431" > < / a > < span class = "lineno" > 431< / span > < span class = "comment" > // ' is_bound_(item_i)' is false when there is no decision for item_i yet.< / span > < / div >
< div class = "line" > < a id = "l00432" name = "l00432" > < / a > < span class = "lineno" > 432< / span > < span class = "comment" > // When item_i is bound, ' is_in_(item_i)' represents the presence (true) or< / span > < / div >
< div class = "line" > < a id = "l00433" name = "l00433" > < / a > < span class = "lineno" > 433< / span > < span class = "comment" > // the absence (false) of item_i in the current solution.< / span > < / div >
< div class = "line" > < a id = "l00434" name = "l00434" > < / a > < span class = "lineno" > 434< / span > std::vector< bool> is_bound_;< / div >
< div class = "line" > < a id = "l00435" name = "l00435" > < / a > < span class = "lineno" > 435< / span > std::vector< bool> is_in_;< / div >
< div class = "line" > < a id = "l00436" name = "l00436" > < / a > < span class = "lineno" > 436< / span > < / div >
< div class = "line" > < a id = "l00437" name = "l00437" > < / a > < span class = "lineno" > 437< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_class" href = "classoperations__research_1_1_knapsack_state.html" > KnapsackState< / a > );< / div >
< div class = "line" > < a id = "l00438" name = "l00438" > < / a > < span class = "lineno" > 438< / span > };< / div >
< div class = "line" > < a id = "l00439" name = "l00439" > < / a > < span class = "lineno" > 439< / span > < / div >
< div class = "line" > < a id = "l00440" name = "l00440" > < / a > < span class = "lineno" > 440< / span > < span class = "comment" > // ----- KnapsackPropagator -----< / span > < / div >
< div class = "line" > < a id = "l00441" name = "l00441" > < / a > < span class = "lineno" > 441< / span > < span class = "comment" > // KnapsackPropagator is the base class for modeling and propagating a< / span > < / div >
< div class = "line" > < a id = "l00442" name = "l00442" > < / a > < span class = "lineno" > 442< / span > < span class = "comment" > // constraint given an assignment.< / span > < / div >
< div class = "line" > < a id = "l00443" name = "l00443" > < / a > < span class = "lineno" > 443< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00444" name = "l00444" > < / a > < span class = "lineno" > 444< / span > < span class = "comment" > // When some work has to be done both by the base and the derived class,< / span > < / div >
< div class = "line" > < a id = "l00445" name = "l00445" > < / a > < span class = "lineno" > 445< / span > < span class = "comment" > // a protected pure virtual method ending by ' Propagator' is defined.< / span > < / div >
< div class = "line" > < a id = "l00446" name = "l00446" > < / a > < span class = "lineno" > 446< / span > < span class = "comment" > // For instance, ' Init' creates a vector of items, and then calls< / span > < / div >
< div class = "line" > < a id = "l00447" name = "l00447" > < / a > < span class = "lineno" > 447< / span > < span class = "comment" > // ' InitPropagator' to let the derived class perform its own initialization.< / span > < / div >
< div class = "line" > < a id = "l00448" name = "l00448" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html" > 448< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_propagator.html" > KnapsackPropagator< / a > {< / div >
< div class = "line" > < a id = "l00449" name = "l00449" > < / a > < span class = "lineno" > 449< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00450" name = "l00450" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#af28391017c090a638200c57b4c8a2ac1" > 450< / a > < / span > < span class = "keyword" > explicit< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#af28391017c090a638200c57b4c8a2ac1" > KnapsackPropagator< / a > (< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_state.html" > KnapsackState< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#afebda22d5e2e068671aa4dbfbe9024df" > state< / a > );< / div >
< div class = "line" > < a id = "l00451" name = "l00451" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#accafea74a5951ec85cd803541f3ab3fe" > 451< / a > < / span > < span class = "keyword" > virtual< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#accafea74a5951ec85cd803541f3ab3fe" > ~KnapsackPropagator< / a > ();< / div >
< div class = "line" > < a id = "l00452" name = "l00452" > < / a > < span class = "lineno" > 452< / span > < / div >
< div class = "line" > < a id = "l00453" name = "l00453" > < / a > < span class = "lineno" > 453< / span > < span class = "comment" > // Initializes data structure and then calls InitPropagator.< / span > < / div >
< div class = "line" > < a id = "l00454" name = "l00454" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a04d8883567a6e02787f2362e6543a21b" > 454< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a04d8883567a6e02787f2362e6543a21b" > Init< / a > (< span class = "keyword" > const< / span > std::vector< int64_t> & profits,< / div >
< div class = "line" > < a id = "l00455" name = "l00455" > < / a > < span class = "lineno" > 455< / span > < span class = "keyword" > const< / span > std::vector< int64_t> & weights);< / div >
< div class = "line" > < a id = "l00456" name = "l00456" > < / a > < span class = "lineno" > 456< / span > < / div >
< div class = "line" > < a id = "l00457" name = "l00457" > < / a > < span class = "lineno" > 457< / span > < span class = "comment" > // Updates data structure and then calls UpdatePropagator.< / span > < / div >
< div class = "line" > < a id = "l00458" name = "l00458" > < / a > < span class = "lineno" > 458< / span > < span class = "comment" > // Returns false when failure.< / span > < / div >
< div class = "line" > < a id = "l00459" name = "l00459" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#af4b38123d3654471f0868774c5ff877d" > 459< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#af4b38123d3654471f0868774c5ff877d" > Update< / a > (< span class = "keywordtype" > bool< / span > revert, < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & assignment);< / div >
< div class = "line" > < a id = "l00460" name = "l00460" > < / a > < span class = "lineno" > 460< / span > < span class = "comment" > // ComputeProfitBounds should set ' profit_lower_bound_' and< / span > < / div >
< div class = "line" > < a id = "l00461" name = "l00461" > < / a > < span class = "lineno" > 461< / span > < span class = "comment" > // ' profit_upper_bound_' which are constraint specific.< / span > < / div >
< div class = "line" > < a id = "l00462" name = "l00462" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a8ae457a5297bac5ad83517ba54b819d1" > 462< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a8ae457a5297bac5ad83517ba54b819d1" > ComputeProfitBounds< / a > () = 0;< / div >
< div class = "line" > < a id = "l00463" name = "l00463" > < / a > < span class = "lineno" > 463< / span > < span class = "comment" > // Returns the id of next item to assign.< / span > < / div >
< div class = "line" > < a id = "l00464" name = "l00464" > < / a > < span class = "lineno" > 464< / span > < span class = "comment" > // Returns kNoSelection when all items are bound.< / span > < / div >
< div class = "line" > < a id = "l00465" name = "l00465" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a9aea5e61ac71dca1139fda445cc2dfee" > 465< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > int< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a9aea5e61ac71dca1139fda445cc2dfee" > GetNextItemId< / a > () < span class = "keyword" > const< / span > = 0;< / div >
< div class = "line" > < a id = "l00466" name = "l00466" > < / a > < span class = "lineno" > 466< / span > < / div >
< div class = "line" > < a id = "l00467" name = "l00467" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a08beea2d857241d99287935a91be5217" > 467< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a08beea2d857241d99287935a91be5217" > current_profit< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > current_profit_; }< / div >
< div class = "line" > < a id = "l00468" name = "l00468" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#ae04e419341e0b9772a057aff10ce63a0" > 468< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#ae04e419341e0b9772a057aff10ce63a0" > profit_lower_bound< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > profit_lower_bound_; }< / div >
< div class = "line" > < a id = "l00469" name = "l00469" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#aa68069fd1180cb37fcdbc99d6230bc3e" > 469< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#aa68069fd1180cb37fcdbc99d6230bc3e" > profit_upper_bound< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > profit_upper_bound_; }< / div >
< div class = "line" > < a id = "l00470" name = "l00470" > < / a > < span class = "lineno" > 470< / span > < / div >
< div class = "line" > < a id = "l00471" name = "l00471" > < / a > < span class = "lineno" > 471< / span > < span class = "comment" > // Copies the current state into ' solution' .< / span > < / div >
< div class = "line" > < a id = "l00472" name = "l00472" > < / a > < span class = "lineno" > 472< / span > < span class = "comment" > // All unbound items are set to false (i.e. not in the knapsack).< / span > < / div >
< div class = "line" > < a id = "l00473" name = "l00473" > < / a > < span class = "lineno" > 473< / span > < span class = "comment" > // When ' has_one_propagator' is true, CopyCurrentSolutionPropagator is called< / span > < / div >
< div class = "line" > < a id = "l00474" name = "l00474" > < / a > < span class = "lineno" > 474< / span > < span class = "comment" > // to have a better solution. When there is only one propagator< / span > < / div >
< div class = "line" > < a id = "l00475" name = "l00475" > < / a > < span class = "lineno" > 475< / span > < span class = "comment" > // there is no need to check the solution with other propagators, so the< / span > < / div >
< div class = "line" > < a id = "l00476" name = "l00476" > < / a > < span class = "lineno" > 476< / span > < span class = "comment" > // partial solution can be smartly completed.< / span > < / div >
< div class = "line" > < a id = "l00477" name = "l00477" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a1fa45af1bf0d6aa9d5f86e2ed9ae5323" > 477< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a1fa45af1bf0d6aa9d5f86e2ed9ae5323" > CopyCurrentStateToSolution< / a > (< span class = "keywordtype" > bool< / span > has_one_propagator,< / div >
< div class = "line" > < a id = "l00478" name = "l00478" > < / a > < span class = "lineno" > 478< / span > std::vector< bool> * solution) < span class = "keyword" > const< / span > ;< / div >
< div class = "line" > < a id = "l00479" name = "l00479" > < / a > < span class = "lineno" > 479< / span > < / div >
< div class = "line" > < a id = "l00480" name = "l00480" > < / a > < span class = "lineno" > 480< / span > < span class = "keyword" > protected< / span > :< / div >
< div class = "line" > < a id = "l00481" name = "l00481" > < / a > < span class = "lineno" > 481< / span > < span class = "comment" > // Initializes data structure. This method is called after initialization< / span > < / div >
< div class = "line" > < a id = "l00482" name = "l00482" > < / a > < span class = "lineno" > 482< / span > < span class = "comment" > // of KnapsackPropagator data structure.< / span > < / div >
< div class = "line" > < a id = "l00483" name = "l00483" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a883cd053b1e7322727eb9e19940f69f6" > 483< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a883cd053b1e7322727eb9e19940f69f6" > InitPropagator< / a > () = 0;< / div >
< div class = "line" > < a id = "l00484" name = "l00484" > < / a > < span class = "lineno" > 484< / span > < / div >
< div class = "line" > < a id = "l00485" name = "l00485" > < / a > < span class = "lineno" > 485< / span > < span class = "comment" > // Updates internal data structure incrementally. This method is called< / span > < / div >
< div class = "line" > < a id = "l00486" name = "l00486" > < / a > < span class = "lineno" > 486< / span > < span class = "comment" > // after update of KnapsackPropagator data structure.< / span > < / div >
< div class = "line" > < a id = "l00487" name = "l00487" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a5a0d11be6f0d5b521477226fb7573db8" > 487< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a5a0d11be6f0d5b521477226fb7573db8" > UpdatePropagator< / a > (< span class = "keywordtype" > bool< / span > revert,< / div >
< div class = "line" > < a id = "l00488" name = "l00488" > < / a > < span class = "lineno" > 488< / span > < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & assignment) = 0;< / div >
< div class = "line" > < a id = "l00489" name = "l00489" > < / a > < span class = "lineno" > 489< / span > < / div >
< div class = "line" > < a id = "l00490" name = "l00490" > < / a > < span class = "lineno" > 490< / span > < span class = "comment" > // Copies the current state into ' solution' .< / span > < / div >
< div class = "line" > < a id = "l00491" name = "l00491" > < / a > < span class = "lineno" > 491< / span > < span class = "comment" > // Only unbound items have to be copied as CopyCurrentSolution was already< / span > < / div >
< div class = "line" > < a id = "l00492" name = "l00492" > < / a > < span class = "lineno" > 492< / span > < span class = "comment" > // called with current state.< / span > < / div >
< div class = "line" > < a id = "l00493" name = "l00493" > < / a > < span class = "lineno" > 493< / span > < span class = "comment" > // This method is useful when a propagator is able to find a better solution< / span > < / div >
< div class = "line" > < a id = "l00494" name = "l00494" > < / a > < span class = "lineno" > 494< / span > < span class = "comment" > // than the blind instantiation to false of unbound items.< / span > < / div >
< div class = "line" > < a id = "l00495" name = "l00495" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#ab803770e8e21bb448a2f3d940ab125f8" > 495< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#ab803770e8e21bb448a2f3d940ab125f8" > CopyCurrentStateToSolutionPropagator< / a > (< / div >
< div class = "line" > < a id = "l00496" name = "l00496" > < / a > < span class = "lineno" > 496< / span > std::vector< bool> * solution) < span class = "keyword" > const< / span > = 0;< / div >
< div class = "line" > < a id = "l00497" name = "l00497" > < / a > < span class = "lineno" > 497< / span > < / div >
< div class = "line" > < a id = "l00498" name = "l00498" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#afebda22d5e2e068671aa4dbfbe9024df" > 498< / a > < / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_state.html" > KnapsackState< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#afebda22d5e2e068671aa4dbfbe9024df" > state< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > state_; }< / div >
< div class = "line" > < a id = "l00499" name = "l00499" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#a701e8fc6dbf7ffeb4c48512ffa6d7501" > 499< / a > < / span > < span class = "keyword" > const< / span > std::vector< KnapsackItemPtr> & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#a701e8fc6dbf7ffeb4c48512ffa6d7501" > items< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > items_; }< / div >
< div class = "line" > < a id = "l00500" name = "l00500" > < / a > < span class = "lineno" > 500< / span > < / div >
< div class = "line" > < a id = "l00501" name = "l00501" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#ae29226a5be6204e26f1d563a6630ab9e" > 501< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#ae29226a5be6204e26f1d563a6630ab9e" > set_profit_lower_bound< / a > (int64_t profit) { profit_lower_bound_ = profit; }< / div >
< div class = "line" > < a id = "l00502" name = "l00502" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_propagator.html#af991b29f273c53c8b35cb09bcccf3a5d" > 502< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#af991b29f273c53c8b35cb09bcccf3a5d" > set_profit_upper_bound< / a > (int64_t profit) { profit_upper_bound_ = profit; }< / div >
< div class = "line" > < a id = "l00503" name = "l00503" > < / a > < span class = "lineno" > 503< / span > < / div >
< div class = "line" > < a id = "l00504" name = "l00504" > < / a > < span class = "lineno" > 504< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00505" name = "l00505" > < / a > < span class = "lineno" > 505< / span > std::vector< KnapsackItemPtr> items_;< / div >
< div class = "line" > < a id = "l00506" name = "l00506" > < / a > < span class = "lineno" > 506< / span > int64_t current_profit_;< / div >
< div class = "line" > < a id = "l00507" name = "l00507" > < / a > < span class = "lineno" > 507< / span > int64_t profit_lower_bound_;< / div >
< div class = "line" > < a id = "l00508" name = "l00508" > < / a > < span class = "lineno" > 508< / span > int64_t profit_upper_bound_;< / div >
< div class = "line" > < a id = "l00509" name = "l00509" > < / a > < span class = "lineno" > 509< / span > < span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_state.html" > KnapsackState< / a > & state_;< / div >
< div class = "line" > < a id = "l00510" name = "l00510" > < / a > < span class = "lineno" > 510< / span > < / div >
< div class = "line" > < a id = "l00511" name = "l00511" > < / a > < span class = "lineno" > 511< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_class" href = "classoperations__research_1_1_knapsack_propagator.html" > KnapsackPropagator< / a > );< / div >
< div class = "line" > < a id = "l00512" name = "l00512" > < / a > < span class = "lineno" > 512< / span > };< / div >
< div class = "line" > < a id = "l00513" name = "l00513" > < / a > < span class = "lineno" > 513< / span > < / div >
< div class = "line" > < a id = "l00514" name = "l00514" > < / a > < span class = "lineno" > 514< / span > < span class = "comment" > // ----- KnapsackCapacityPropagator -----< / span > < / div >
< div class = "line" > < a id = "l00515" name = "l00515" > < / a > < span class = "lineno" > 515< / span > < span class = "comment" > // KnapsackCapacityPropagator is a KnapsackPropagator used to enforce< / span > < / div >
< div class = "line" > < a id = "l00516" name = "l00516" > < / a > < span class = "lineno" > 516< / span > < span class = "comment" > // a capacity constraint.< / span > < / div >
< div class = "line" > < a id = "l00517" name = "l00517" > < / a > < span class = "lineno" > 517< / span > < span class = "comment" > // As a KnapsackPropagator is supposed to compute profit lower and upper< / span > < / div >
< div class = "line" > < a id = "l00518" name = "l00518" > < / a > < span class = "lineno" > 518< / span > < span class = "comment" > // bounds, and get the next item to select, it can be seen as a 0-1 Knapsack< / span > < / div >
< div class = "line" > < a id = "l00519" name = "l00519" > < / a > < span class = "lineno" > 519< / span > < span class = "comment" > // solver. The most efficient way to compute the upper bound is to iterate on< / span > < / div >
< div class = "line" > < a id = "l00520" name = "l00520" > < / a > < span class = "lineno" > 520< / span > < span class = "comment" > // items in profit-per-unit-weight decreasing order. The break item is< / span > < / div >
< div class = "line" > < a id = "l00521" name = "l00521" > < / a > < span class = "lineno" > 521< / span > < span class = "comment" > // commonly defined as the first item for which there is not enough remaining< / span > < / div >
< div class = "line" > < a id = "l00522" name = "l00522" > < / a > < span class = "lineno" > 522< / span > < span class = "comment" > // capacity. Selecting this break item as the next-item-to-assign usually< / span > < / div >
< div class = "line" > < a id = "l00523" name = "l00523" > < / a > < span class = "lineno" > 523< / span > < span class = "comment" > // gives the best results (see Greenberg & Hegerich).< / span > < / div >
< div class = "line" > < a id = "l00524" name = "l00524" > < / a > < span class = "lineno" > 524< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00525" name = "l00525" > < / a > < span class = "lineno" > 525< / span > < span class = "comment" > // This is exactly what is implemented in this class.< / span > < / div >
< div class = "line" > < a id = "l00526" name = "l00526" > < / a > < span class = "lineno" > 526< / span > < span class = "comment" > //< / span > < / div >
< div class = "line" > < a id = "l00527" name = "l00527" > < / a > < span class = "lineno" > 527< / span > < span class = "comment" > // When there is only one propagator, it is possible to compute a better< / span > < / div >
< div class = "line" > < a id = "l00528" name = "l00528" > < / a > < span class = "lineno" > 528< / span > < span class = "comment" > // profit lower bound almost for free. During the scan to find the< / span > < / div >
< div class = "line" > < a id = "l00529" name = "l00529" > < / a > < span class = "lineno" > 529< / span > < span class = "comment" > // break element all unbound items are added just as if they were part of< / span > < / div >
< div class = "line" > < a id = "l00530" name = "l00530" > < / a > < span class = "lineno" > 530< / span > < span class = "comment" > // the current solution. This is used in both ComputeProfitBounds and< / span > < / div >
< div class = "line" > < a id = "l00531" name = "l00531" > < / a > < span class = "lineno" > 531< / span > < span class = "comment" > // CopyCurrentSolutionPropagator.< / span > < / div >
< div class = "line" > < a id = "l00532" name = "l00532" > < / a > < span class = "lineno" > 532< / span > < span class = "comment" > // For incrementality reasons, the ith item should be accessible in O(1). That' s< / span > < / div >
< div class = "line" > < a id = "l00533" name = "l00533" > < / a > < span class = "lineno" > 533< / span > < span class = "comment" > // the reason why the item vector has to be duplicated ' sorted_items_' .< / span > < / div >
< div class = "line" > < a id = "l00534" name = "l00534" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html" > 534< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_capacity_propagator.html" > KnapsackCapacityPropagator< / a > : < span class = "keyword" > public< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_propagator.html" > KnapsackPropagator< / a > {< / div >
< div class = "line" > < a id = "l00535" name = "l00535" > < / a > < span class = "lineno" > 535< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00536" name = "l00536" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a2ce43dc07784f3d9634df0a5c0dc39b0" > 536< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a2ce43dc07784f3d9634df0a5c0dc39b0" > KnapsackCapacityPropagator< / a > (< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_state.html" > KnapsackState< / a > & < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_propagator.html#afebda22d5e2e068671aa4dbfbe9024df" > state< / a > , int64_t capacity);< / div >
< div class = "line" > < a id = "l00537" name = "l00537" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#aa14e63156675c18c06073ac1cb8aa170" > 537< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#aa14e63156675c18c06073ac1cb8aa170" > ~KnapsackCapacityPropagator< / a > () < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00538" name = "l00538" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a9921c39ed90a9cd32301ee0fee9491cb" > 538< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a9921c39ed90a9cd32301ee0fee9491cb" > ComputeProfitBounds< / a > () < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00539" name = "l00539" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#afccfe4a5a27c2c805016d82886795da9" > 539< / a > < / span > < span class = "keywordtype" > int< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#afccfe4a5a27c2c805016d82886795da9" > GetNextItemId< / a > ()< span class = "keyword" > const override < / span > { < span class = "keywordflow" > return< / span > break_item_id_; }< / div >
< div class = "line" > < a id = "l00540" name = "l00540" > < / a > < span class = "lineno" > 540< / span > < / div >
< div class = "line" > < a id = "l00541" name = "l00541" > < / a > < span class = "lineno" > 541< / span > < span class = "keyword" > protected< / span > :< / div >
< div class = "line" > < a id = "l00542" name = "l00542" > < / a > < span class = "lineno" > 542< / span > < span class = "comment" > // Initializes KnapsackCapacityPropagator (e.g., sort items in decreasing< / span > < / div >
< div class = "line" > < a id = "l00543" name = "l00543" > < / a > < span class = "lineno" > 543< / span > < span class = "comment" > // order).< / span > < / div >
< div class = "line" > < a id = "l00544" name = "l00544" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#ae2545020be753ee6a66c277daac41784" > 544< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#ae2545020be753ee6a66c277daac41784" > InitPropagator< / a > () < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00545" name = "l00545" > < / a > < span class = "lineno" > 545< / span > < span class = "comment" > // Updates internal data structure incrementally (i.e., ' consumed_capacity_' )< / span > < / div >
< div class = "line" > < a id = "l00546" name = "l00546" > < / a > < span class = "lineno" > 546< / span > < span class = "comment" > // to avoid a O(number_of_items) scan.< / span > < / div >
< div class = "line" > < a id = "l00547" name = "l00547" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a3cde41b7fa0c9734783a562aadd9ef8c" > 547< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a3cde41b7fa0c9734783a562aadd9ef8c" > UpdatePropagator< / a > (< span class = "keywordtype" > bool< / span > revert,< / div >
< div class = "line" > < a id = "l00548" name = "l00548" > < / a > < span class = "lineno" > 548< / span > < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & assignment) < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00549" name = "l00549" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a706a3a7c9568016131afd718f347ec8d" > 549< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a706a3a7c9568016131afd718f347ec8d" > CopyCurrentStateToSolutionPropagator< / a > (< / div >
< div class = "line" > < a id = "l00550" name = "l00550" > < / a > < span class = "lineno" > 550< / span > std::vector< bool> * solution) < span class = "keyword" > const override< / span > ;< / div >
< div class = "line" > < a id = "l00551" name = "l00551" > < / a > < span class = "lineno" > 551< / span > < / div >
< div class = "line" > < a id = "l00552" name = "l00552" > < / a > < span class = "lineno" > 552< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00553" name = "l00553" > < / a > < span class = "lineno" > 553< / span > < span class = "comment" > // An obvious additional profit upper bound corresponds to the linear< / span > < / div >
< div class = "line" > < a id = "l00554" name = "l00554" > < / a > < span class = "lineno" > 554< / span > < span class = "comment" > // relaxation: remaining_capacity * efficiency of the break item.< / span > < / div >
< div class = "line" > < a id = "l00555" name = "l00555" > < / a > < span class = "lineno" > 555< / span > < span class = "comment" > // It is possible to do better in O(1), using Martello-Toth bound U2.< / span > < / div >
< div class = "line" > < a id = "l00556" name = "l00556" > < / a > < span class = "lineno" > 556< / span > < span class = "comment" > // The main idea is to enforce integrality constraint on the break item,< / span > < / div >
< div class = "line" > < a id = "l00557" name = "l00557" > < / a > < span class = "lineno" > 557< / span > < span class = "comment" > // ie. either the break item is part of the solution, either it is not.< / span > < / div >
< div class = "line" > < a id = "l00558" name = "l00558" > < / a > < span class = "lineno" > 558< / span > < span class = "comment" > // So basically the linear relaxation is done on the item before the break< / span > < / div >
< div class = "line" > < a id = "l00559" name = "l00559" > < / a > < span class = "lineno" > 559< / span > < span class = "comment" > // item, or the one after the break item.< / span > < / div >
< div class = "line" > < a id = "l00560" name = "l00560" > < / a > < span class = "lineno" > 560< / span > < span class = "comment" > // This is what GetAdditionalProfit method implements.< / span > < / div >
< div class = "line" > < a id = "l00561" name = "l00561" > < / a > < span class = "lineno" > 561< / span > int64_t GetAdditionalProfit(int64_t remaining_capacity,< / div >
< div class = "line" > < a id = "l00562" name = "l00562" > < / a > < span class = "lineno" > 562< / span > < span class = "keywordtype" > int< / span > break_item_id) < span class = "keyword" > const< / span > ;< / div >
< div class = "line" > < a id = "l00563" name = "l00563" > < / a > < span class = "lineno" > 563< / span > < / div >
< div class = "line" > < a id = "l00564" name = "l00564" > < / a > < span class = "lineno" > 564< / span > < span class = "keyword" > const< / span > int64_t capacity_;< / div >
< div class = "line" > < a id = "l00565" name = "l00565" > < / a > < span class = "lineno" > 565< / span > int64_t consumed_capacity_;< / div >
< div class = "line" > < a id = "l00566" name = "l00566" > < / a > < span class = "lineno" > 566< / span > < span class = "keywordtype" > int< / span > break_item_id_;< / div >
< div class = "line" > < a id = "l00567" name = "l00567" > < / a > < span class = "lineno" > 567< / span > std::vector< KnapsackItemPtr> sorted_items_;< / div >
< div class = "line" > < a id = "l00568" name = "l00568" > < / a > < span class = "lineno" > 568< / span > int64_t profit_max_;< / div >
< div class = "line" > < a id = "l00569" name = "l00569" > < / a > < span class = "lineno" > 569< / span > < / div >
< div class = "line" > < a id = "l00570" name = "l00570" > < / a > < span class = "lineno" > 570< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_class" href = "classoperations__research_1_1_knapsack_capacity_propagator.html" > KnapsackCapacityPropagator< / a > );< / div >
< div class = "line" > < a id = "l00571" name = "l00571" > < / a > < span class = "lineno" > 571< / span > };< / div >
< div class = "line" > < a id = "l00572" name = "l00572" > < / a > < span class = "lineno" > 572< / span > < / div >
< div class = "line" > < a id = "l00573" name = "l00573" > < / a > < span class = "lineno" > 573< / span > < span class = "comment" > // ----- BaseKnapsackSolver -----< / span > < / div >
< div class = "line" > < a id = "l00574" name = "l00574" > < / a > < span class = "lineno" > 574< / span > < span class = "comment" > // This is the base class for knapsack solvers.< / span > < / div >
< div class = "line" > < a id = "l00575" name = "l00575" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html" > 575< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_base_knapsack_solver.html" > BaseKnapsackSolver< / a > {< / div >
< div class = "line" > < a id = "l00576" name = "l00576" > < / a > < span class = "lineno" > 576< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00577" name = "l00577" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#ac6518fa5a6dd37173c7700bc2d9b6071" > 577< / a > < / span > < span class = "keyword" > explicit< / span > < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#ac6518fa5a6dd37173c7700bc2d9b6071" > BaseKnapsackSolver< / a > (< span class = "keyword" > const< / span > std::string& solver_name)< / div >
< div class = "line" > < a id = "l00578" name = "l00578" > < / a > < span class = "lineno" > 578< / span > : solver_name_(solver_name) {}< / div >
< div class = "line" > < a id = "l00579" name = "l00579" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#ab5b44517ac32ba76590129831a826096" > 579< / a > < / span > < span class = "keyword" > virtual< / span > < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#ab5b44517ac32ba76590129831a826096" > ~BaseKnapsackSolver< / a > () {}< / div >
< div class = "line" > < a id = "l00580" name = "l00580" > < / a > < span class = "lineno" > 580< / span > < / div >
< div class = "line" > < a id = "l00581" name = "l00581" > < / a > < span class = "lineno" > 581< / span > < span class = "comment" > // Initializes the solver and enters the problem to be solved.< / span > < / div >
< div class = "line" > < a id = "l00582" name = "l00582" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#abb1c2efb23ee210447502a9baab0812a" > 582< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#abb1c2efb23ee210447502a9baab0812a" > Init< / a > (< span class = "keyword" > const< / span > std::vector< int64_t> & profits,< / div >
< div class = "line" > < a id = "l00583" name = "l00583" > < / a > < span class = "lineno" > 583< / span > < span class = "keyword" > const< / span > std::vector< std::vector< int64_t> > & weights,< / div >
< div class = "line" > < a id = "l00584" name = "l00584" > < / a > < span class = "lineno" > 584< / span > < span class = "keyword" > const< / span > std::vector< int64_t> & capacities) = 0;< / div >
< div class = "line" > < a id = "l00585" name = "l00585" > < / a > < span class = "lineno" > 585< / span > < / div >
< div class = "line" > < a id = "l00586" name = "l00586" > < / a > < span class = "lineno" > 586< / span > < span class = "comment" > // Gets the lower and upper bound when the item is in or out of the knapsack.< / span > < / div >
< div class = "line" > < a id = "l00587" name = "l00587" > < / a > < span class = "lineno" > 587< / span > < span class = "comment" > // To ensure objects are correctly initialized, this method should not be< / span > < / div >
< div class = "line" > < a id = "l00588" name = "l00588" > < / a > < span class = "lineno" > 588< / span > < span class = "comment" > // called before ::Init.< / span > < / div >
< div class = "line" > < a id = "l00589" name = "l00589" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#a89ae568099e8a8937bb049a1626e6d3a" > 589< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#a89ae568099e8a8937bb049a1626e6d3a" > GetLowerAndUpperBoundWhenItem< / a > (< span class = "keywordtype" > int< / span > item_id, < span class = "keywordtype" > bool< / span > is_item_in,< / div >
< div class = "line" > < a id = "l00590" name = "l00590" > < / a > < span class = "lineno" > 590< / span > int64_t* lower_bound,< / div >
< div class = "line" > < a id = "l00591" name = "l00591" > < / a > < span class = "lineno" > 591< / span > int64_t* upper_bound);< / div >
< div class = "line" > < a id = "l00592" name = "l00592" > < / a > < span class = "lineno" > 592< / span > < / div >
< div class = "line" > < a id = "l00593" name = "l00593" > < / a > < span class = "lineno" > 593< / span > < span class = "comment" > // Solves the problem and returns the profit of the optimal solution.< / span > < / div >
< div class = "line" > < a id = "l00594" name = "l00594" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#aae09d1be6e3ce3d746c833f7da003de9" > 594< / a > < / span > < span class = "keyword" > virtual< / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#aae09d1be6e3ce3d746c833f7da003de9" > Solve< / a > (TimeLimit* time_limit, < span class = "keywordtype" > bool< / span > * is_solution_optimal) = 0;< / div >
< div class = "line" > < a id = "l00595" name = "l00595" > < / a > < span class = "lineno" > 595< / span > < / div >
< div class = "line" > < a id = "l00596" name = "l00596" > < / a > < span class = "lineno" > 596< / span > < span class = "comment" > // Returns true if the item ' item_id' is packed in the optimal knapsack.< / span > < / div >
< div class = "line" > < a id = "l00597" name = "l00597" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#af75968e8e76e35de6e7cdfaa0488b131" > 597< / a > < / span > < span class = "keyword" > virtual< / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#af75968e8e76e35de6e7cdfaa0488b131" > best_solution< / a > (< span class = "keywordtype" > int< / span > item_id) < span class = "keyword" > const< / span > = 0;< / div >
< div class = "line" > < a id = "l00598" name = "l00598" > < / a > < span class = "lineno" > 598< / span > < / div >
< div class = "line" > < a id = "l00599" name = "l00599" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_base_knapsack_solver.html#ae194e7bee4a383e5ee6c8ed341b49b7e" > 599< / a > < / span > < span class = "keyword" > virtual< / span > std::string < a class = "code hl_function" href = "classoperations__research_1_1_base_knapsack_solver.html#ae194e7bee4a383e5ee6c8ed341b49b7e" > GetName< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > solver_name_; }< / div >
< div class = "line" > < a id = "l00600" name = "l00600" > < / a > < span class = "lineno" > 600< / span > < / div >
< div class = "line" > < a id = "l00601" name = "l00601" > < / a > < span class = "lineno" > 601< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00602" name = "l00602" > < / a > < span class = "lineno" > 602< / span > < span class = "keyword" > const< / span > std::string solver_name_;< / div >
< div class = "line" > < a id = "l00603" name = "l00603" > < / a > < span class = "lineno" > 603< / span > };< / div >
< div class = "line" > < a id = "l00604" name = "l00604" > < / a > < span class = "lineno" > 604< / span > < / div >
< div class = "line" > < a id = "l00605" name = "l00605" > < / a > < span class = "lineno" > 605< / span > < span class = "comment" > // ----- KnapsackGenericSolver -----< / span > < / div >
< div class = "line" > < a id = "l00606" name = "l00606" > < / a > < span class = "lineno" > 606< / span > < span class = "comment" > // KnapsackGenericSolver is the multi-dimensional knapsack solver class.< / span > < / div >
< div class = "line" > < a id = "l00607" name = "l00607" > < / a > < span class = "lineno" > 607< / span > < span class = "comment" > // In the current implementation, the next item to assign is given by the< / span > < / div >
< div class = "line" > < a id = "l00608" name = "l00608" > < / a > < span class = "lineno" > 608< / span > < span class = "comment" > // master propagator. Using SetMasterPropagator allows changing the default< / span > < / div >
< div class = "line" > < a id = "l00609" name = "l00609" > < / a > < span class = "lineno" > 609< / span > < span class = "comment" > // (propagator of the first dimension), and selecting another dimension when< / span > < / div >
< div class = "line" > < a id = "l00610" name = "l00610" > < / a > < span class = "lineno" > 610< / span > < span class = "comment" > // more constrained.< / span > < / div >
< div class = "line" > < a id = "l00611" name = "l00611" > < / a > < span class = "lineno" > 611< / span > < span class = "comment" > // TODO(user): In the case of a multi-dimensional knapsack problem, implement< / span > < / div >
< div class = "line" > < a id = "l00612" name = "l00612" > < / a > < span class = "lineno" > 612< / span > < span class = "comment" > // an aggregated propagator to combine all dimensions and give a better guide< / span > < / div >
< div class = "line" > < a id = "l00613" name = "l00613" > < / a > < span class = "lineno" > 613< / span > < span class = "comment" > // to select the next item (see, for instance, Dobson' s aggregated efficiency).< / span > < / div >
< div class = "line" > < a id = "l00614" name = "l00614" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html" > 614< / a > < / span > < span class = "keyword" > class < / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_generic_solver.html" > KnapsackGenericSolver< / a > : < span class = "keyword" > public< / span > < a class = "code hl_class" href = "classoperations__research_1_1_base_knapsack_solver.html" > BaseKnapsackSolver< / a > {< / div >
< div class = "line" > < a id = "l00615" name = "l00615" > < / a > < span class = "lineno" > 615< / span > < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a id = "l00616" name = "l00616" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a7bff5cf8a51192eadec54eb0499064" > 616< / a > < / span > < span class = "keyword" > explicit< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a7bff5cf8a51192eadec54eb0499064" > KnapsackGenericSolver< / a > (< span class = "keyword" > const< / span > std::string& solver_name);< / div >
< div class = "line" > < a id = "l00617" name = "l00617" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a25594d97a0a532f9d814bdc6dea380" > 617< / a > < / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a25594d97a0a532f9d814bdc6dea380" > ~KnapsackGenericSolver< / a > () < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00618" name = "l00618" > < / a > < span class = "lineno" > 618< / span > < / div >
< div class = "line" > < a id = "l00619" name = "l00619" > < / a > < span class = "lineno" > 619< / span > < span class = "comment" > // Initializes the solver and enters the problem to be solved.< / span > < / div >
< div class = "line" > < a id = "l00620" name = "l00620" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#a734b6464309adbbdeb63ef759f690ff1" > 620< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a734b6464309adbbdeb63ef759f690ff1" > Init< / a > (< span class = "keyword" > const< / span > std::vector< int64_t> & profits,< / div >
< div class = "line" > < a id = "l00621" name = "l00621" > < / a > < span class = "lineno" > 621< / span > < span class = "keyword" > const< / span > std::vector< std::vector< int64_t> > & weights,< / div >
< div class = "line" > < a id = "l00622" name = "l00622" > < / a > < span class = "lineno" > 622< / span > < span class = "keyword" > const< / span > std::vector< int64_t> & capacities) < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00623" name = "l00623" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#a5c677592ee5e7312c64475ebae949eab" > 623< / a > < / span > < span class = "keywordtype" > int< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a5c677592ee5e7312c64475ebae949eab" > GetNumberOfItems< / a > ()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > state_.< a class = "code hl_function" href = "classoperations__research_1_1_knapsack_state.html#a5c677592ee5e7312c64475ebae949eab" > GetNumberOfItems< / a > (); }< / div >
< div class = "line" > < a id = "l00624" name = "l00624" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#ac9849a7043959c65033fa6f4a63bb10e" > 624< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#ac9849a7043959c65033fa6f4a63bb10e" > GetLowerAndUpperBoundWhenItem< / a > (< span class = "keywordtype" > int< / span > item_id, < span class = "keywordtype" > bool< / span > is_item_in,< / div >
< div class = "line" > < a id = "l00625" name = "l00625" > < / a > < span class = "lineno" > 625< / span > int64_t* lower_bound,< / div >
< div class = "line" > < a id = "l00626" name = "l00626" > < / a > < span class = "lineno" > 626< / span > int64_t* upper_bound) < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00627" name = "l00627" > < / a > < span class = "lineno" > 627< / span > < / div >
< div class = "line" > < a id = "l00628" name = "l00628" > < / a > < span class = "lineno" > 628< / span > < span class = "comment" > // Sets which propagator should be used to guide the search.< / span > < / div >
< div class = "line" > < a id = "l00629" name = "l00629" > < / a > < span class = "lineno" > 629< / span > < span class = "comment" > // ' master_propagator_id' should be in 0..p-1 with p the number of< / span > < / div >
< div class = "line" > < a id = "l00630" name = "l00630" > < / a > < span class = "lineno" > 630< / span > < span class = "comment" > // propagators.< / span > < / div >
< div class = "line" > < a id = "l00631" name = "l00631" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#a3df2fc3d96fbcac78a632d7dbf3b8550" > 631< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a3df2fc3d96fbcac78a632d7dbf3b8550" > set_master_propagator_id< / a > (< span class = "keywordtype" > int< / span > master_propagator_id) {< / div >
< div class = "line" > < a id = "l00632" name = "l00632" > < / a > < span class = "lineno" > 632< / span > master_propagator_id_ = master_propagator_id;< / div >
< div class = "line" > < a id = "l00633" name = "l00633" > < / a > < span class = "lineno" > 633< / span > }< / div >
< div class = "line" > < a id = "l00634" name = "l00634" > < / a > < span class = "lineno" > 634< / span > < / div >
< div class = "line" > < a id = "l00635" name = "l00635" > < / a > < span class = "lineno" > 635< / span > < span class = "comment" > // Solves the problem and returns the profit of the optimal solution.< / span > < / div >
< div class = "line" > < a id = "l00636" name = "l00636" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#a788a597dac89a082d3ed4994d654dec1" > 636< / a > < / span > int64_t < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a788a597dac89a082d3ed4994d654dec1" > Solve< / a > (TimeLimit* time_limit, < span class = "keywordtype" > bool< / span > * is_solution_optimal) < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a id = "l00637" name = "l00637" > < / a > < span class = "lineno" > 637< / span > < span class = "comment" > // Returns true if the item ' item_id' is packed in the optimal knapsack.< / span > < / div >
< div class = "line" > < a id = "l00638" name = "l00638" > < / a > < span class = "lineno" > < a class = "line" href = "classoperations__research_1_1_knapsack_generic_solver.html#abfd4cb3faa2f1d6840b8123765fa2fc4" > 638< / a > < / span > < span class = "keywordtype" > bool< / span > < a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#abfd4cb3faa2f1d6840b8123765fa2fc4" > best_solution< / a > (< span class = "keywordtype" > int< / span > item_id)< span class = "keyword" > const override < / span > {< / div >
< div class = "line" > < a id = "l00639" name = "l00639" > < / a > < span class = "lineno" > 639< / span > < span class = "keywordflow" > return< / span > best_solution_.at(item_id);< / div >
< div class = "line" > < a id = "l00640" name = "l00640" > < / a > < span class = "lineno" > 640< / span > }< / div >
< div class = "line" > < a id = "l00641" name = "l00641" > < / a > < span class = "lineno" > 641< / span > < / div >
< div class = "line" > < a id = "l00642" name = "l00642" > < / a > < span class = "lineno" > 642< / span > < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a id = "l00643" name = "l00643" > < / a > < span class = "lineno" > 643< / span > < span class = "comment" > // Clears internal data structure.< / span > < / div >
< div class = "line" > < a id = "l00644" name = "l00644" > < / a > < span class = "lineno" > 644< / span > < span class = "keywordtype" > void< / span > Clear();< / div >
< div class = "line" > < a id = "l00645" name = "l00645" > < / a > < span class = "lineno" > 645< / span > < / div >
< div class = "line" > < a id = "l00646" name = "l00646" > < / a > < span class = "lineno" > 646< / span > < span class = "comment" > // Updates all propagators reverting/applying all decision on the path.< / span > < / div >
< div class = "line" > < a id = "l00647" name = "l00647" > < / a > < span class = "lineno" > 647< / span > < span class = "comment" > // Returns true if fails. Note that, even if fails, all propagators should< / span > < / div >
< div class = "line" > < a id = "l00648" name = "l00648" > < / a > < span class = "lineno" > 648< / span > < span class = "comment" > // be updated to be in a stable state in order to stay incremental.< / span > < / div >
< div class = "line" > < a id = "l00649" name = "l00649" > < / a > < span class = "lineno" > 649< / span > < span class = "keywordtype" > bool< / span > UpdatePropagators(< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_path.html" > KnapsackSearchPath< / a > & path);< / div >
< div class = "line" > < a id = "l00650" name = "l00650" > < / a > < span class = "lineno" > 650< / span > < span class = "comment" > // Updates all propagators reverting/applying one decision.< / span > < / div >
< div class = "line" > < a id = "l00651" name = "l00651" > < / a > < span class = "lineno" > 651< / span > < span class = "comment" > // Return true if fails. Note that, even if fails, all propagators should< / span > < / div >
< div class = "line" > < a id = "l00652" name = "l00652" > < / a > < span class = "lineno" > 652< / span > < span class = "comment" > // be updated to be in a stable state in order to stay incremental.< / span > < / div >
< div class = "line" > < a id = "l00653" name = "l00653" > < / a > < span class = "lineno" > 653< / span > < span class = "keywordtype" > bool< / span > IncrementalUpdate(< span class = "keywordtype" > bool< / span > revert, < span class = "keyword" > const< / span > < a class = "code hl_struct" href = "structoperations__research_1_1_knapsack_assignment.html" > KnapsackAssignment< / a > & assignment);< / div >
< div class = "line" > < a id = "l00654" name = "l00654" > < / a > < span class = "lineno" > 654< / span > < span class = "comment" > // Updates the best solution if the current solution has a better profit.< / span > < / div >
< div class = "line" > < a id = "l00655" name = "l00655" > < / a > < span class = "lineno" > 655< / span > < span class = "keywordtype" > void< / span > UpdateBestSolution();< / div >
< div class = "line" > < a id = "l00656" name = "l00656" > < / a > < span class = "lineno" > 656< / span > < / div >
< div class = "line" > < a id = "l00657" name = "l00657" > < / a > < span class = "lineno" > 657< / span > < span class = "comment" > // Returns true if new relevant search node was added to the nodes array, that< / span > < / div >
< div class = "line" > < a id = "l00658" name = "l00658" > < / a > < span class = "lineno" > 658< / span > < span class = "comment" > // means this node should be added to the search queue too.< / span > < / div >
< div class = "line" > < a id = "l00659" name = "l00659" > < / a > < span class = "lineno" > 659< / span > < span class = "keywordtype" > bool< / span > MakeNewNode(< span class = "keyword" > const< / span > < a class = "code hl_class" href = "classoperations__research_1_1_knapsack_search_node.html" > KnapsackSearchNode< / a > & node, < span class = "keywordtype" > bool< / span > is_in);< / div >
< div class = "line" > < a id = "l00660" name = "l00660" > < / a > < span class = "lineno" > 660< / span > < / div >
< div class = "line" > < a id = "l00661" name = "l00661" > < / a > < span class = "lineno" > 661< / span > < span class = "comment" > // Gets the aggregated (min) profit upper bound among all propagators.< / span > < / div >
< div class = "line" > < a id = "l00662" name = "l00662" > < / a > < span class = "lineno" > 662< / span > int64_t GetAggregatedProfitUpperBound() < span class = "keyword" > const< / span > ;< / div >
< div class = "line" > < a id = "l00663" name = "l00663" > < / a > < span class = "lineno" > 663< / span > < span class = "keywordtype" > bool< / span > HasOnePropagator()< span class = "keyword" > const < / span > { < span class = "keywordflow" > return< / span > propagators_.size() == 1; }< / div >
< div class = "line" > < a id = "l00664" name = "l00664" > < / a > < span class = "lineno" > 664< / span > int64_t GetCurrentProfit()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a id = "l00665" name = "l00665" > < / a > < span class = "lineno" > 665< / span > < span class = "keywordflow" > return< / span > propagators_.at(master_propagator_id_)-> current_profit();< / div >
< div class = "line" > < a id = "l00666" name = "l00666" > < / a > < span class = "lineno" > 666< / span > }< / div >
< div class = "line" > < a id = "l00667" name = "l00667" > < / a > < span class = "lineno" > 667< / span > int64_t GetNextItemId()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a id = "l00668" name = "l00668" > < / a > < span class = "lineno" > 668< / span > < span class = "keywordflow" > return< / span > propagators_.at(master_propagator_id_)-> GetNextItemId();< / div >
< div class = "line" > < a id = "l00669" name = "l00669" > < / a > < span class = "lineno" > 669< / span > }< / div >
< div class = "line" > < a id = "l00670" name = "l00670" > < / a > < span class = "lineno" > 670< / span > < / div >
< div class = "line" > < a id = "l00671" name = "l00671" > < / a > < span class = "lineno" > 671< / span > std::vector< KnapsackPropagator*> propagators_;< / div >
< div class = "line" > < a id = "l00672" name = "l00672" > < / a > < span class = "lineno" > 672< / span > < span class = "keywordtype" > int< / span > master_propagator_id_;< / div >
< div class = "line" > < a id = "l00673" name = "l00673" > < / a > < span class = "lineno" > 673< / span > std::vector< KnapsackSearchNode*> search_nodes_;< / div >
< div class = "line" > < a id = "l00674" name = "l00674" > < / a > < span class = "lineno" > 674< / span > KnapsackState state_;< / div >
< div class = "line" > < a id = "l00675" name = "l00675" > < / a > < span class = "lineno" > 675< / span > int64_t best_solution_profit_;< / div >
< div class = "line" > < a id = "l00676" name = "l00676" > < / a > < span class = "lineno" > 676< / span > std::vector< bool> best_solution_;< / div >
< div class = "line" > < a id = "l00677" name = "l00677" > < / a > < span class = "lineno" > 677< / span > < / div >
< div class = "line" > < a id = "l00678" name = "l00678" > < / a > < span class = "lineno" > 678< / span > DISALLOW_COPY_AND_ASSIGN(< a class = "code hl_function" href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a7bff5cf8a51192eadec54eb0499064" > KnapsackGenericSolver< / a > );< / div >
< div class = "line" > < a id = "l00679" name = "l00679" > < / a > < span class = "lineno" > 679< / span > };< / div >
< div class = "line" > < a id = "l00680" name = "l00680" > < / a > < span class = "lineno" > 680< / span > < span class = "preprocessor" > #endif < / span > < span class = "comment" > // SWIG< / span > < / div >
< div class = "line" > < a id = "l00681" name = "l00681" > < / a > < span class = "lineno" > 681< / span > } < span class = "comment" > // namespace operations_research< / span > < / div >
< div class = "line" > < a id = "l00682" name = "l00682" > < / a > < span class = "lineno" > 682< / span > < / div >
< div class = "line" > < a id = "l00683" name = "l00683" > < / a > < span class = "lineno" > 683< / span > < span class = "preprocessor" > #endif < / span > < span class = "comment" > // OR_TOOLS_ALGORITHMS_KNAPSACK_SOLVER_H_< / span > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html" > operations_research::BaseKnapsackSolver< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00575" > knapsack_solver.h:575< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_a89ae568099e8a8937bb049a1626e6d3a" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#a89ae568099e8a8937bb049a1626e6d3a" > operations_research::BaseKnapsackSolver::GetLowerAndUpperBoundWhenItem< / a > < / div > < div class = "ttdeci" > virtual void GetLowerAndUpperBoundWhenItem(int item_id, bool is_item_in, int64_t *lower_bound, int64_t *upper_bound)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_aae09d1be6e3ce3d746c833f7da003de9" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#aae09d1be6e3ce3d746c833f7da003de9" > operations_research::BaseKnapsackSolver::Solve< / a > < / div > < div class = "ttdeci" > virtual int64_t Solve(TimeLimit *time_limit, bool *is_solution_optimal)=0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_ab5b44517ac32ba76590129831a826096" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#ab5b44517ac32ba76590129831a826096" > operations_research::BaseKnapsackSolver::~BaseKnapsackSolver< / a > < / div > < div class = "ttdeci" > virtual ~BaseKnapsackSolver()< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00579" > knapsack_solver.h:579< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_abb1c2efb23ee210447502a9baab0812a" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#abb1c2efb23ee210447502a9baab0812a" > operations_research::BaseKnapsackSolver::Init< / a > < / div > < div class = "ttdeci" > virtual void Init(const std::vector< int64_t > & profits, const std::vector< std::vector< int64_t > > & weights, const std::vector< int64_t > & capacities)=0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_ac6518fa5a6dd37173c7700bc2d9b6071" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#ac6518fa5a6dd37173c7700bc2d9b6071" > operations_research::BaseKnapsackSolver::BaseKnapsackSolver< / a > < / div > < div class = "ttdeci" > BaseKnapsackSolver(const std::string & solver_name)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00577" > knapsack_solver.h:577< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_ae194e7bee4a383e5ee6c8ed341b49b7e" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#ae194e7bee4a383e5ee6c8ed341b49b7e" > operations_research::BaseKnapsackSolver::GetName< / a > < / div > < div class = "ttdeci" > virtual std::string GetName() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00599" > knapsack_solver.h:599< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_base_knapsack_solver_html_af75968e8e76e35de6e7cdfaa0488b131" > < div class = "ttname" > < a href = "classoperations__research_1_1_base_knapsack_solver.html#af75968e8e76e35de6e7cdfaa0488b131" > operations_research::BaseKnapsackSolver::best_solution< / a > < / div > < div class = "ttdeci" > virtual bool best_solution(int item_id) const =0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html" > operations_research::KnapsackCapacityPropagator< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00534" > knapsack_solver.h:534< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_a2ce43dc07784f3d9634df0a5c0dc39b0" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a2ce43dc07784f3d9634df0a5c0dc39b0" > operations_research::KnapsackCapacityPropagator::KnapsackCapacityPropagator< / a > < / div > < div class = "ttdeci" > KnapsackCapacityPropagator(const KnapsackState & state, int64_t capacity)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_a3cde41b7fa0c9734783a562aadd9ef8c" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a3cde41b7fa0c9734783a562aadd9ef8c" > operations_research::KnapsackCapacityPropagator::UpdatePropagator< / a > < / div > < div class = "ttdeci" > bool UpdatePropagator(bool revert, const KnapsackAssignment & assignment) override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_a706a3a7c9568016131afd718f347ec8d" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a706a3a7c9568016131afd718f347ec8d" > operations_research::KnapsackCapacityPropagator::CopyCurrentStateToSolutionPropagator< / a > < / div > < div class = "ttdeci" > void CopyCurrentStateToSolutionPropagator(std::vector< bool > *solution) const override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_a9921c39ed90a9cd32301ee0fee9491cb" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#a9921c39ed90a9cd32301ee0fee9491cb" > operations_research::KnapsackCapacityPropagator::ComputeProfitBounds< / a > < / div > < div class = "ttdeci" > void ComputeProfitBounds() override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_aa14e63156675c18c06073ac1cb8aa170" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#aa14e63156675c18c06073ac1cb8aa170" > operations_research::KnapsackCapacityPropagator::~KnapsackCapacityPropagator< / a > < / div > < div class = "ttdeci" > ~KnapsackCapacityPropagator() override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_ae2545020be753ee6a66c277daac41784" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#ae2545020be753ee6a66c277daac41784" > operations_research::KnapsackCapacityPropagator::InitPropagator< / a > < / div > < div class = "ttdeci" > void InitPropagator() override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_capacity_propagator_html_afccfe4a5a27c2c805016d82886795da9" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_capacity_propagator.html#afccfe4a5a27c2c805016d82886795da9" > operations_research::KnapsackCapacityPropagator::GetNextItemId< / a > < / div > < div class = "ttdeci" > int GetNextItemId() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00539" > knapsack_solver.h:539< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html" > operations_research::KnapsackGenericSolver< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00614" > knapsack_solver.h:614< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_a2a25594d97a0a532f9d814bdc6dea380" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a25594d97a0a532f9d814bdc6dea380" > operations_research::KnapsackGenericSolver::~KnapsackGenericSolver< / a > < / div > < div class = "ttdeci" > ~KnapsackGenericSolver() override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_a2a7bff5cf8a51192eadec54eb0499064" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#a2a7bff5cf8a51192eadec54eb0499064" > operations_research::KnapsackGenericSolver::KnapsackGenericSolver< / a > < / div > < div class = "ttdeci" > KnapsackGenericSolver(const std::string & solver_name)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_a3df2fc3d96fbcac78a632d7dbf3b8550" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#a3df2fc3d96fbcac78a632d7dbf3b8550" > operations_research::KnapsackGenericSolver::set_master_propagator_id< / a > < / div > < div class = "ttdeci" > void set_master_propagator_id(int master_propagator_id)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00631" > knapsack_solver.h:631< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_a5c677592ee5e7312c64475ebae949eab" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#a5c677592ee5e7312c64475ebae949eab" > operations_research::KnapsackGenericSolver::GetNumberOfItems< / a > < / div > < div class = "ttdeci" > int GetNumberOfItems() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00623" > knapsack_solver.h:623< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_a734b6464309adbbdeb63ef759f690ff1" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#a734b6464309adbbdeb63ef759f690ff1" > operations_research::KnapsackGenericSolver::Init< / a > < / div > < div class = "ttdeci" > void Init(const std::vector< int64_t > & profits, const std::vector< std::vector< int64_t > > & weights, const std::vector< int64_t > & capacities) override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_a788a597dac89a082d3ed4994d654dec1" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#a788a597dac89a082d3ed4994d654dec1" > operations_research::KnapsackGenericSolver::Solve< / a > < / div > < div class = "ttdeci" > int64_t Solve(TimeLimit *time_limit, bool *is_solution_optimal) override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_abfd4cb3faa2f1d6840b8123765fa2fc4" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#abfd4cb3faa2f1d6840b8123765fa2fc4" > operations_research::KnapsackGenericSolver::best_solution< / a > < / div > < div class = "ttdeci" > bool best_solution(int item_id) const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00638" > knapsack_solver.h:638< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_generic_solver_html_ac9849a7043959c65033fa6f4a63bb10e" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_generic_solver.html#ac9849a7043959c65033fa6f4a63bb10e" > operations_research::KnapsackGenericSolver::GetLowerAndUpperBoundWhenItem< / a > < / div > < div class = "ttdeci" > void GetLowerAndUpperBoundWhenItem(int item_id, bool is_item_in, int64_t *lower_bound, int64_t *upper_bound) override< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html" > operations_research::KnapsackPropagator< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00448" > knapsack_solver.h:448< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a04d8883567a6e02787f2362e6543a21b" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a04d8883567a6e02787f2362e6543a21b" > operations_research::KnapsackPropagator::Init< / a > < / div > < div class = "ttdeci" > void Init(const std::vector< int64_t > & profits, const std::vector< int64_t > & weights)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a08beea2d857241d99287935a91be5217" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a08beea2d857241d99287935a91be5217" > operations_research::KnapsackPropagator::current_profit< / a > < / div > < div class = "ttdeci" > int64_t current_profit() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00467" > knapsack_solver.h:467< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a1fa45af1bf0d6aa9d5f86e2ed9ae5323" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a1fa45af1bf0d6aa9d5f86e2ed9ae5323" > operations_research::KnapsackPropagator::CopyCurrentStateToSolution< / a > < / div > < div class = "ttdeci" > void CopyCurrentStateToSolution(bool has_one_propagator, std::vector< bool > *solution) const< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a5a0d11be6f0d5b521477226fb7573db8" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a5a0d11be6f0d5b521477226fb7573db8" > operations_research::KnapsackPropagator::UpdatePropagator< / a > < / div > < div class = "ttdeci" > virtual bool UpdatePropagator(bool revert, const KnapsackAssignment & assignment)=0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a701e8fc6dbf7ffeb4c48512ffa6d7501" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a701e8fc6dbf7ffeb4c48512ffa6d7501" > operations_research::KnapsackPropagator::items< / a > < / div > < div class = "ttdeci" > const std::vector< KnapsackItemPtr > & items() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00499" > knapsack_solver.h:499< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a883cd053b1e7322727eb9e19940f69f6" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a883cd053b1e7322727eb9e19940f69f6" > operations_research::KnapsackPropagator::InitPropagator< / a > < / div > < div class = "ttdeci" > virtual void InitPropagator()=0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a8ae457a5297bac5ad83517ba54b819d1" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a8ae457a5297bac5ad83517ba54b819d1" > operations_research::KnapsackPropagator::ComputeProfitBounds< / a > < / div > < div class = "ttdeci" > virtual void ComputeProfitBounds()=0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_a9aea5e61ac71dca1139fda445cc2dfee" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#a9aea5e61ac71dca1139fda445cc2dfee" > operations_research::KnapsackPropagator::GetNextItemId< / a > < / div > < div class = "ttdeci" > virtual int GetNextItemId() const =0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_aa68069fd1180cb37fcdbc99d6230bc3e" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#aa68069fd1180cb37fcdbc99d6230bc3e" > operations_research::KnapsackPropagator::profit_upper_bound< / a > < / div > < div class = "ttdeci" > int64_t profit_upper_bound() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00469" > knapsack_solver.h:469< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_ab803770e8e21bb448a2f3d940ab125f8" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#ab803770e8e21bb448a2f3d940ab125f8" > operations_research::KnapsackPropagator::CopyCurrentStateToSolutionPropagator< / a > < / div > < div class = "ttdeci" > virtual void CopyCurrentStateToSolutionPropagator(std::vector< bool > *solution) const =0< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_accafea74a5951ec85cd803541f3ab3fe" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#accafea74a5951ec85cd803541f3ab3fe" > operations_research::KnapsackPropagator::~KnapsackPropagator< / a > < / div > < div class = "ttdeci" > virtual ~KnapsackPropagator()< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_ae04e419341e0b9772a057aff10ce63a0" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#ae04e419341e0b9772a057aff10ce63a0" > operations_research::KnapsackPropagator::profit_lower_bound< / a > < / div > < div class = "ttdeci" > int64_t profit_lower_bound() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00468" > knapsack_solver.h:468< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_ae29226a5be6204e26f1d563a6630ab9e" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#ae29226a5be6204e26f1d563a6630ab9e" > operations_research::KnapsackPropagator::set_profit_lower_bound< / a > < / div > < div class = "ttdeci" > void set_profit_lower_bound(int64_t profit)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00501" > knapsack_solver.h:501< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_af28391017c090a638200c57b4c8a2ac1" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#af28391017c090a638200c57b4c8a2ac1" > operations_research::KnapsackPropagator::KnapsackPropagator< / a > < / div > < div class = "ttdeci" > KnapsackPropagator(const KnapsackState & state)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_af4b38123d3654471f0868774c5ff877d" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#af4b38123d3654471f0868774c5ff877d" > operations_research::KnapsackPropagator::Update< / a > < / div > < div class = "ttdeci" > bool Update(bool revert, const KnapsackAssignment & assignment)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_af991b29f273c53c8b35cb09bcccf3a5d" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#af991b29f273c53c8b35cb09bcccf3a5d" > operations_research::KnapsackPropagator::set_profit_upper_bound< / a > < / div > < div class = "ttdeci" > void set_profit_upper_bound(int64_t profit)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00502" > knapsack_solver.h:502< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_propagator_html_afebda22d5e2e068671aa4dbfbe9024df" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_propagator.html#afebda22d5e2e068671aa4dbfbe9024df" > operations_research::KnapsackPropagator::state< / a > < / div > < div class = "ttdeci" > const KnapsackState & state() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00498" > knapsack_solver.h:498< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html" > operations_research::KnapsackSearchNode< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00339" > knapsack_solver.h:339< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_a08beea2d857241d99287935a91be5217" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#a08beea2d857241d99287935a91be5217" > operations_research::KnapsackSearchNode::current_profit< / a > < / div > < div class = "ttdeci" > int64_t current_profit() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00347" > knapsack_solver.h:347< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_a48521e7b1a381bd3f3f452fa6e697bde" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#a48521e7b1a381bd3f3f452fa6e697bde" > operations_research::KnapsackSearchNode::set_current_profit< / a > < / div > < div class = "ttdeci" > void set_current_profit(int64_t profit)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00348" > knapsack_solver.h:348< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_a6fdd73f8011695b97659f2bea29325cb" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#a6fdd73f8011695b97659f2bea29325cb" > operations_research::KnapsackSearchNode::depth< / a > < / div > < div class = "ttdeci" > int depth() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00343" > knapsack_solver.h:343< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_a94dca4e57f87ba2a9e3b995c267c0821" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#a94dca4e57f87ba2a9e3b995c267c0821" > operations_research::KnapsackSearchNode::next_item_id< / a > < / div > < div class = "ttdeci" > int next_item_id() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00353" > knapsack_solver.h:353< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_a94edd193a3f600c604a314803f723d93" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#a94edd193a3f600c604a314803f723d93" > operations_research::KnapsackSearchNode::parent< / a > < / div > < div class = "ttdeci" > const KnapsackSearchNode *const parent() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00344" > knapsack_solver.h:344< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_a9962698a737cd21789c77ff32bef0d98" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#a9962698a737cd21789c77ff32bef0d98" > operations_research::KnapsackSearchNode::set_next_item_id< / a > < / div > < div class = "ttdeci" > void set_next_item_id(int id)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00354" > knapsack_solver.h:354< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_aa68069fd1180cb37fcdbc99d6230bc3e" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#aa68069fd1180cb37fcdbc99d6230bc3e" > operations_research::KnapsackSearchNode::profit_upper_bound< / a > < / div > < div class = "ttdeci" > int64_t profit_upper_bound() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00350" > knapsack_solver.h:350< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_ad17e46a2afcf393a4ec9159162c969f2" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#ad17e46a2afcf393a4ec9159162c969f2" > operations_research::KnapsackSearchNode::KnapsackSearchNode< / a > < / div > < div class = "ttdeci" > KnapsackSearchNode(const KnapsackSearchNode *const parent, const KnapsackAssignment & assignment)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_af94db7bbd58faf999d63953ef12784fe" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#af94db7bbd58faf999d63953ef12784fe" > operations_research::KnapsackSearchNode::assignment< / a > < / div > < div class = "ttdeci" > const KnapsackAssignment & assignment() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00345" > knapsack_solver.h:345< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_node_html_af991b29f273c53c8b35cb09bcccf3a5d" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_node.html#af991b29f273c53c8b35cb09bcccf3a5d" > operations_research::KnapsackSearchNode::set_profit_upper_bound< / a > < / div > < div class = "ttdeci" > void set_profit_upper_bound(int64_t profit)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00351" > knapsack_solver.h:351< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html" > operations_research::KnapsackSearchPath< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00393" > knapsack_solver.h:393< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html_a09f219a2226f7c0de0f50b6f00c099e3" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html#a09f219a2226f7c0de0f50b6f00c099e3" > operations_research::KnapsackSearchPath::MoveUpToDepth< / a > < / div > < div class = "ttdeci" > const KnapsackSearchNode * MoveUpToDepth(const KnapsackSearchNode & node, int depth) const< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html_a1e3b6d38df0786ccf7f938d60e386aae" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html#a1e3b6d38df0786ccf7f938d60e386aae" > operations_research::KnapsackSearchPath::Init< / a > < / div > < div class = "ttdeci" > void Init()< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html_a3dc3602e1a640bc986956e0ce5e88d04" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html#a3dc3602e1a640bc986956e0ce5e88d04" > operations_research::KnapsackSearchPath::KnapsackSearchPath< / a > < / div > < div class = "ttdeci" > KnapsackSearchPath(const KnapsackSearchNode & from, const KnapsackSearchNode & to)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html_a97db8ba091791787900dd812fefc10e5" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html#a97db8ba091791787900dd812fefc10e5" > operations_research::KnapsackSearchPath::from< / a > < / div > < div class = "ttdeci" > const KnapsackSearchNode & from() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00398" > knapsack_solver.h:398< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html_ab54cc176a72a1a03b18cb3f9649c773a" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html#ab54cc176a72a1a03b18cb3f9649c773a" > operations_research::KnapsackSearchPath::via< / a > < / div > < div class = "ttdeci" > const KnapsackSearchNode & via() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00399" > knapsack_solver.h:399< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_search_path_html_ad0e1cf5e8520cb7a59cad8d6aecdf8a6" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_search_path.html#ad0e1cf5e8520cb7a59cad8d6aecdf8a6" > operations_research::KnapsackSearchPath::to< / a > < / div > < div class = "ttdeci" > const KnapsackSearchNode & to() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00400" > knapsack_solver.h:400< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html" > operations_research::KnapsackSolver< / a > < / div > < div class = "ttdoc" > This library solves knapsack problems.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00117" > knapsack_solver.h:117< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a09627cf25401a9880d2e94551ecbf993" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a09627cf25401a9880d2e94551ecbf993" > operations_research::KnapsackSolver::KnapsackSolver< / a > < / div > < div class = "ttdeci" > KnapsackSolver(SolverType solver_type, const std::string & solver_name)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a57d88f584d14b161580550918c8fbf3b" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a57d88f584d14b161580550918c8fbf3b" > operations_research::KnapsackSolver::BestSolutionContains< / a > < / div > < div class = "ttdeci" > bool BestSolutionContains(int item_id) const< / div > < div class = "ttdoc" > Returns true if the item 'item_id' is packed in the optimal knapsack.< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a6b46c35c8977efde66ae7ad97423bdf2" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a6b46c35c8977efde66ae7ad97423bdf2" > operations_research::KnapsackSolver::KnapsackSolver< / a > < / div > < div class = "ttdeci" > KnapsackSolver(const std::string & solver_name)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a6b4f6cbb00a64b0e9745938f9b99d0c8" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a6b4f6cbb00a64b0e9745938f9b99d0c8" > operations_research::KnapsackSolver::set_time_limit< / a > < / div > < div class = "ttdeci" > void set_time_limit(double time_limit_seconds)< / div > < div class = "ttdoc" > Time limit in seconds.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00235" > knapsack_solver.h:235< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a7f5467b49f2cba3d8804e44ed76e12a2" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a7f5467b49f2cba3d8804e44ed76e12a2" > operations_research::KnapsackSolver::Solve< / a > < / div > < div class = "ttdeci" > int64_t Solve()< / div > < div class = "ttdoc" > Solves the problem and returns the profit of the optimal solution.< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306ec" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ec" > operations_research::KnapsackSolver::SolverType< / a > < / div > < div class = "ttdeci" > SolverType< / div > < div class = "ttdoc" > Enum controlling which underlying algorithm is used.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00124" > knapsack_solver.h:124< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306eca1f4e1e2f80ab9c7d4fc1b14d9f5da959" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca1f4e1e2f80ab9c7d4fc1b14d9f5da959" > operations_research::KnapsackSolver::KNAPSACK_MULTIDIMENSION_SCIP_MIP_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_MULTIDIMENSION_SCIP_MIP_SOLVER< / div > < div class = "ttdoc" > SCIP based solver.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00171" > knapsack_solver.h:171< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306eca2a4e77eec4f386d17001e7285e812a0b" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca2a4e77eec4f386d17001e7285e812a0b" > operations_research::KnapsackSolver::KNAPSACK_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER< / div > < div class = "ttdoc" > Generic Solver.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00163" > knapsack_solver.h:163< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306eca793d998526508cfcc2bfc89fe25b3edd" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca793d998526508cfcc2bfc89fe25b3edd" > operations_research::KnapsackSolver::KNAPSACK_DYNAMIC_PROGRAMMING_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_DYNAMIC_PROGRAMMING_SOLVER< / div > < div class = "ttdoc" > Dynamic Programming approach for single dimension problems.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00147" > knapsack_solver.h:147< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306eca9d4c4118c9e4dc258e5052c0a457098d" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306eca9d4c4118c9e4dc258e5052c0a457098d" > operations_research::KnapsackSolver::KNAPSACK_DIVIDE_AND_CONQUER_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_DIVIDE_AND_CONQUER_SOLVER< / div > < div class = "ttdoc" > Divide and Conquer approach for single dimension problems.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00198" > knapsack_solver.h:198< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306ecaa020f211a1ff184e712aa4f372d6ea34" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecaa020f211a1ff184e712aa4f372d6ea34" > operations_research::KnapsackSolver::KNAPSACK_64ITEMS_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_64ITEMS_SOLVER< / div > < div class = "ttdoc" > Optimized method for single dimension small problems.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00139" > knapsack_solver.h:139< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306ecac43056d6d2f96cee37fcb8a752b0ff45" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecac43056d6d2f96cee37fcb8a752b0ff45" > operations_research::KnapsackSolver::KNAPSACK_BRUTE_FORCE_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_BRUTE_FORCE_SOLVER< / div > < div class = "ttdoc" > Brute force method.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00131" > knapsack_solver.h:131< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a8b06041d7c1fb05f379714f4312306ecae2ce6e36a247621de398e875d5feb575" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a8b06041d7c1fb05f379714f4312306ecae2ce6e36a247621de398e875d5feb575" > operations_research::KnapsackSolver::KNAPSACK_MULTIDIMENSION_CBC_MIP_SOLVER< / a > < / div > < div class = "ttdeci" > @ KNAPSACK_MULTIDIMENSION_CBC_MIP_SOLVER< / div > < div class = "ttdoc" > CBC Based Solver.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00155" > knapsack_solver.h:155< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a9647a5f765048e8662e5efa54c7d8687" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a9647a5f765048e8662e5efa54c7d8687" > operations_research::KnapsackSolver::IsSolutionOptimal< / a > < / div > < div class = "ttdeci" > bool IsSolutionOptimal() const< / div > < div class = "ttdoc" > Returns true if the solution was proven optimal.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00224" > knapsack_solver.h:224< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_a9a98946a64f3893b085f650932c9dfee" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#a9a98946a64f3893b085f650932c9dfee" > operations_research::KnapsackSolver::GetName< / a > < / div > < div class = "ttdeci" > std::string GetName() const< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_aa5b8e0a03c593bfc3cef0ba8d178844f" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#aa5b8e0a03c593bfc3cef0ba8d178844f" > operations_research::KnapsackSolver::set_use_reduction< / a > < / div > < div class = "ttdeci" > void set_use_reduction(bool use_reduction)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00228" > knapsack_solver.h:228< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_ac7d0a3efa2aabe6a3e667b0724f63688" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#ac7d0a3efa2aabe6a3e667b0724f63688" > operations_research::KnapsackSolver::use_reduction< / a > < / div > < div class = "ttdeci" > bool use_reduction() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00227" > knapsack_solver.h:227< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_adecc1cf1fe064b843459dd1f8aec12ff" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#adecc1cf1fe064b843459dd1f8aec12ff" > operations_research::KnapsackSolver::~KnapsackSolver< / a > < / div > < div class = "ttdeci" > virtual ~KnapsackSolver()< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_solver_html_ae5982edf1a2974495d20201775a765e2" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_solver.html#ae5982edf1a2974495d20201775a765e2" > operations_research::KnapsackSolver::Init< / a > < / div > < div class = "ttdeci" > void Init(const std::vector< int64_t > & profits, const std::vector< std::vector< int64_t > > & weights, const std::vector< int64_t > & capacities)< / div > < div class = "ttdoc" > Initializes the solver and enters the problem to be solved.< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html" > operations_research::KnapsackState< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00414" > knapsack_solver.h:414< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html_a41f9430cc0090383e7797a88c1dbacbc" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html#a41f9430cc0090383e7797a88c1dbacbc" > operations_research::KnapsackState::KnapsackState< / a > < / div > < div class = "ttdeci" > KnapsackState()< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html_a5c677592ee5e7312c64475ebae949eab" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html#a5c677592ee5e7312c64475ebae949eab" > operations_research::KnapsackState::GetNumberOfItems< / a > < / div > < div class = "ttdeci" > int GetNumberOfItems() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00425" > knapsack_solver.h:425< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html_a6308c7a97200f84f6ebf5b2c487b0362" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html#a6308c7a97200f84f6ebf5b2c487b0362" > operations_research::KnapsackState::Init< / a > < / div > < div class = "ttdeci" > void Init(int number_of_items)< / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html_a862bf4e908cd82ea44f72e98558016ad" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html#a862bf4e908cd82ea44f72e98558016ad" > operations_research::KnapsackState::is_in< / a > < / div > < div class = "ttdeci" > bool is_in(int id) const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00427" > knapsack_solver.h:427< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html_a89aa280d2321c1316aa1305106f1bb49" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html#a89aa280d2321c1316aa1305106f1bb49" > operations_research::KnapsackState::is_bound< / a > < / div > < div class = "ttdeci" > bool is_bound(int id) const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00426" > knapsack_solver.h:426< / a > < / div > < / div >
< div class = "ttc" id = "aclassoperations__research_1_1_knapsack_state_html_ab771ac0e538f991b73b011ee3ba11f05" > < div class = "ttname" > < a href = "classoperations__research_1_1_knapsack_state.html#ab771ac0e538f991b73b011ee3ba11f05" > operations_research::KnapsackState::UpdateState< / a > < / div > < div class = "ttdeci" > bool UpdateState(bool revert, const KnapsackAssignment & assignment)< / div > < / div >
< div class = "ttc" id = "anamespaceoperations__research_html" > < div class = "ttname" > < a href = "namespaceoperations__research.html" > operations_research< / a > < / 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 >
< div class = "ttc" id = "anamespaceoperations__research_html_ada7d9b46f657c6053a197273a85043a7" > < div class = "ttname" > < a href = "namespaceoperations__research.html#ada7d9b46f657c6053a197273a85043a7" > operations_research::KnapsackItemPtr< / a > < / div > < div class = "ttdeci" > KnapsackItem * KnapsackItemPtr< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00329" > knapsack_solver.h:329< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_assignment_html" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_assignment.html" > operations_research::KnapsackAssignment< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00295" > knapsack_solver.h:295< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_assignment_html_a1c0c3c835f3c4363b650fba65c7ebf32" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_assignment.html#a1c0c3c835f3c4363b650fba65c7ebf32" > operations_research::KnapsackAssignment::item_id< / a > < / div > < div class = "ttdeci" > int item_id< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00298" > knapsack_solver.h:298< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_assignment_html_a8f85eb172a4c6bed0d042f7d269fc457" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_assignment.html#a8f85eb172a4c6bed0d042f7d269fc457" > operations_research::KnapsackAssignment::KnapsackAssignment< / a > < / div > < div class = "ttdeci" > KnapsackAssignment(int _item_id, bool _is_in)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00296" > knapsack_solver.h:296< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_assignment_html_a922620900c7a18d22de686d47e25d4ed" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_assignment.html#a922620900c7a18d22de686d47e25d4ed" > operations_research::KnapsackAssignment::is_in< / a > < / div > < div class = "ttdeci" > bool is_in< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00299" > knapsack_solver.h:299< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_item_html" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_item.html" > operations_research::KnapsackItem< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00314" > knapsack_solver.h:314< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_item_html_a523234416a08d890505d4b34fb0513ee" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_item.html#a523234416a08d890505d4b34fb0513ee" > operations_research::KnapsackItem::weight< / a > < / div > < div class = "ttdeci" > const int64_t weight< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00326" > knapsack_solver.h:326< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_item_html_a64ae40793ade89d800a8c5646d2980fc" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_item.html#a64ae40793ade89d800a8c5646d2980fc" > operations_research::KnapsackItem::id< / a > < / div > < div class = "ttdeci" > const int id< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00325" > knapsack_solver.h:325< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_item_html_a75dd99d0e31e3a347e5ebad01561e31d" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_item.html#a75dd99d0e31e3a347e5ebad01561e31d" > operations_research::KnapsackItem::profit< / a > < / div > < div class = "ttdeci" > const int64_t profit< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00327" > knapsack_solver.h:327< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_item_html_a7eb6bbc72ec605de6f50d0c90f609a85" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_item.html#a7eb6bbc72ec605de6f50d0c90f609a85" > operations_research::KnapsackItem::GetEfficiency< / a > < / div > < div class = "ttdeci" > double GetEfficiency(int64_t profit_max) const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00317" > knapsack_solver.h:317< / a > < / div > < / div >
< div class = "ttc" id = "astructoperations__research_1_1_knapsack_item_html_aefc8a61c2edd00c4daf37056b754e6a0" > < div class = "ttname" > < a href = "structoperations__research_1_1_knapsack_item.html#aefc8a61c2edd00c4daf37056b754e6a0" > operations_research::KnapsackItem::KnapsackItem< / a > < / div > < div class = "ttdeci" > KnapsackItem(int _id, int64_t _weight, int64_t _profit)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "knapsack__solver_8h_source.html#l00315" > knapsack_solver.h:315< / a > < / div > < / div >
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