57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
// Copyright 2010-2011 Google
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "base/commandlineflags.h"
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#include "base/logging.h"
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#include "graph/ebert_graph.h"
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#include "graph/linear_assignment.h"
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namespace operations_research {
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// Test assignment on a 4x4 matrix. Example taken from
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// http://www.ee.oulu.fi/~mpa/matreng/eem1_2-1.htm with kCost[0][1]
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// modified so the optimum solution is unique.
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void AssignmentOn4x4Matrix() {
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LOG(INFO) << "Assignment on 4x4 Matrix";
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const int kNumSources = 4;
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const int kNumTargets = 4;
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const CostValue kCost[kNumSources][kNumTargets] = {
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{ 90, 76, 75, 80 },
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{ 35, 85, 55, 65 },
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{ 125, 95, 90, 105 },
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{ 45, 110, 95, 115 }
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};
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const CostValue kExpectedCost =
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kCost[0][3] + kCost[1][2] + kCost[2][1] + kCost[3][0];
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ForwardStarGraph graph(
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kNumSources + kNumTargets, kNumSources * kNumTargets);
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LinearSumAssignment<ForwardStarGraph> assignment(graph, kNumSources);
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for (NodeIndex source = 0; source < kNumSources; ++source) {
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for (NodeIndex target = 0; target < kNumTargets; ++target) {
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ArcIndex arc = graph.AddArc(source, kNumSources + target);
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assignment.SetArcCost(arc, kCost[source][target]);
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}
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}
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CHECK(assignment.ComputeAssignment());
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CostValue total_cost = assignment.GetCost();
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CHECK_EQ(kExpectedCost, total_cost);
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}
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} // namespace operations_research
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int main(int argc, char **argv) {
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google::ParseCommandLineFlags(&argc, &argv, true);
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operations_research::AssignmentOn4x4Matrix();
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return 0;
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}
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