1 | // -*- c++ -*- |
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2 | #include <iostream> |
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3 | #include <fstream> |
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4 | |
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5 | #include <sage_graph.h> |
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6 | #include <lemon/smart_graph.h> |
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7 | #include <lemon/dimacs.h> |
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8 | #include <lemon/time_measure.h> |
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9 | //#include <graph_wrapper.h> |
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10 | #include <lemon/max_flow.h> |
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11 | //#include <preflow_res.h> |
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12 | #include <for_each_macros.h> |
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13 | |
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14 | using namespace lemon; |
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15 | |
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16 | // Use a DIMACS max flow file as stdin. |
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17 | // read_dimacs_demo < dimacs_max_flow_file |
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18 | |
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19 | |
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20 | int main(int, char **) { |
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21 | |
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22 | typedef SageGraph MutableGraph; |
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23 | |
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24 | typedef SmartGraph Graph; |
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25 | // typedef ListGraph Graph; |
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26 | typedef Graph::Node Node; |
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27 | typedef Graph::EdgeIt EdgeIt; |
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28 | |
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29 | |
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30 | Graph g; |
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31 | Node s, t; |
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32 | Graph::EdgeMap<int> cap(g); |
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33 | //readDimacsMaxFlow(std::cin, g, s, t, cap); |
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34 | readDimacs(std::cin, g, cap, s, t); |
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35 | Timer ts; |
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36 | Graph::EdgeMap<int> flow(g); //0 flow |
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37 | MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > |
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38 | max_flow_test(g, s, t, cap, flow); |
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39 | |
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40 | { |
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41 | std::cout << "preflow ..." << std::endl; |
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42 | FOR_EACH_LOC(Graph::EdgeIt, e, g) flow.set(e, 0); |
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43 | ts.reset(); |
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44 | max_flow_test.preflowPhase1(MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> >::ZERO_FLOW); |
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45 | std::cout << "elapsed time: " << ts << std::endl; |
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46 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
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47 | } |
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48 | |
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49 | { |
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50 | std::cout << "preflow ..." << std::endl; |
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51 | FOR_EACH_LOC(Graph::EdgeIt, e, g) flow.set(e, 0); |
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52 | ts.reset(); |
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53 | max_flow_test.preflowPhase1(MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> >::ZERO_FLOW); |
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54 | std::cout << "elapsed time: " << ts << std::endl; |
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55 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
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56 | } |
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57 | |
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58 | |
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59 | return 0; |
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60 | } |
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