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1 | #include <sys/time.h> |
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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 <list_graph.hh> |
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6 | #include <dimacs.hh> |
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7 | #include <edmonds_karp.hh> |
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8 | |
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9 | using namespace marci; |
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10 | |
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11 | double currTime() { |
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12 | timeval tv; |
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13 | //timezone tz; |
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14 | gettimeofday(&tv, 0); |
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15 | return double(tv.tv_sec)+double(tv.tv_usec)/1000000.0; |
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16 | } |
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17 | |
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18 | // Use a DIMACS max flow file as stdin. |
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19 | // read_dimacs_demo < dimacs_flow_file |
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20 | int main(int, char **) { |
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21 | typedef ListGraph::NodeIt NodeIt; |
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22 | typedef ListGraph::EachEdgeIt EachEdgeIt; |
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23 | |
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24 | ListGraph G; |
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25 | NodeIt s, t; |
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26 | ListGraph::EdgeMap<int> cap(G); |
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27 | readDimacsMaxFlow(std::cin, G, s, t, cap); |
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28 | |
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29 | std::cout << "augmenting path flow algorithm demo..." << std::endl; |
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30 | ListGraph::EdgeMap<int> flow(G); //0 flow |
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31 | |
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32 | double preTime=currTime(); |
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33 | MaxFlow<ListGraph, int, ListGraph::EdgeMap<int>, ListGraph::EdgeMap<int> > max_flow_test(G, s, t, flow, cap); |
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34 | max_flow_test.run(); |
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35 | double pushTime=currTime(); |
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36 | std::cout << "maximum flow: "<< std::endl; |
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37 | for(EachEdgeIt e=G.first<EachEdgeIt>(); e.valid(); ++e) { |
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38 | std::cout<<"("<<G.tail(e)<< "-"<<flow.get(e)<<"->"<<G.head(e)<<") "; |
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39 | } |
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40 | std::cout<<std::endl; |
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41 | std::cout << "elapsed time: " << pushTime-preTime << " sec"<< std::endl; |
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42 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
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43 | |
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44 | return 0; |
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45 | } |
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