1 | // -*- c++ -*- |
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2 | #include <iostream> |
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3 | #include <fstream> |
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4 | #include <vector> |
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5 | #include <cstdlib> |
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6 | |
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7 | #include <list_graph.h> |
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8 | //#include <smart_graph.h> |
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9 | //#include <dimacs.h> |
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10 | #include <time_measure.h> |
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11 | #include <for_each_macros.h> |
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12 | #include <bfs_iterator.h> |
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13 | #include <bipartite_graph_wrapper.h> |
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14 | #include <maps.h> |
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15 | #include <max_flow.h> |
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16 | |
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17 | /** |
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18 | * Inicializalja a veletlenszamgeneratort. |
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19 | * Figyelem, ez nem jo igazi random szamokhoz, |
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20 | * erre ne bizzad a titkaidat! |
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21 | */ |
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22 | void random_init() |
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23 | { |
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24 | unsigned int seed = getpid(); |
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25 | seed |= seed << 15; |
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26 | seed ^= time(0); |
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27 | |
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28 | srand(seed); |
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29 | } |
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30 | |
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31 | /** |
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32 | * Egy veletlen int-et ad vissza 0 es m-1 kozott. |
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33 | */ |
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34 | int random(int m) |
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35 | { |
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36 | return int( double(m) * rand() / (RAND_MAX + 1.0) ); |
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37 | } |
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38 | |
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39 | using namespace hugo; |
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40 | |
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41 | int main() { |
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42 | //typedef UndirListGraph Graph; |
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43 | typedef BipartiteGraph<ListGraph> Graph; |
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44 | |
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45 | typedef Graph::Node Node; |
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46 | typedef Graph::NodeIt NodeIt; |
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47 | typedef Graph::Edge Edge; |
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48 | typedef Graph::EdgeIt EdgeIt; |
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49 | typedef Graph::OutEdgeIt OutEdgeIt; |
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50 | |
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51 | Graph g; |
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52 | |
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53 | std::vector<Graph::Node> s_nodes; |
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54 | std::vector<Graph::Node> t_nodes; |
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55 | |
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56 | int a; |
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57 | std::cout << "number of nodes in the first color class="; |
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58 | std::cin >> a; |
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59 | int b; |
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60 | std::cout << "number of nodes in the second color class="; |
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61 | std::cin >> b; |
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62 | int m; |
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63 | std::cout << "number of edges="; |
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64 | std::cin >> m; |
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65 | |
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66 | |
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67 | for (int i=0; i<a; ++i) s_nodes.push_back(g.addNode(false)); |
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68 | for (int i=0; i<b; ++i) t_nodes.push_back(g.addNode(true)); |
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69 | |
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70 | random_init(); |
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71 | for(int i=0; i<m; ++i) { |
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72 | g.addEdge(s_nodes[random(a)], t_nodes[random(b)]); |
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73 | } |
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74 | |
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75 | std::cout << "Edges of the bipartite graph:" << std::endl; |
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76 | FOR_EACH_LOC(EdgeIt, e, g) std::cout << e << " "; |
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77 | std::cout << std::endl; |
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78 | |
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79 | typedef stGraphWrapper<Graph> stGW; |
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80 | stGW stgw(g); |
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81 | ConstMap<stGW::Edge, int> const1map(1); |
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82 | |
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83 | |
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84 | |
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85 | |
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86 | Timer ts; |
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87 | ts.reset(); |
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88 | stGW::EdgeMap<int> flow(stgw); |
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89 | MaxFlow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > |
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90 | max_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, flow); |
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91 | // while (max_flow_test.augmentOnShortestPath()) { } |
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92 | typedef ListGraph MutableGraph; |
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93 | // while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) { |
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94 | while (max_flow_test.augmentOnBlockingFlow2()) { |
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95 | std::cout << max_flow_test.flowValue() << std::endl; |
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96 | } |
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97 | std::cout << "max flow value: " << max_flow_test.flowValue() << std::endl; |
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98 | std::cout << "elapsed time: " << ts << std::endl; |
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99 | FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { |
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100 | if (flow[e]) std::cout << e << std::endl; |
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101 | } |
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102 | std::cout << std::endl; |
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103 | |
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104 | ts.reset(); |
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105 | stGW::EdgeMap<int> pre_flow(stgw); |
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106 | MaxFlow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > |
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107 | pre_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, pre_flow/*, true*/); |
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108 | pre_flow_test.run(); |
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109 | std::cout << "pre flow value: " << max_flow_test.flowValue() << std::endl; |
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110 | std::cout << "elapsed time: " << ts << std::endl; |
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111 | // FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { |
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112 | // std::cout << e << ": " << pre_flow[e] << "\n"; |
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113 | // } |
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114 | // std::cout << "\n"; |
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115 | |
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116 | return 0; |
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117 | } |
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