1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library. |
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4 | * |
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5 | * Copyright (C) 2003-2010 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #include <sstream> |
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20 | |
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21 | #include <lemon/smart_graph.h> |
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22 | #include <lemon/adaptors.h> |
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23 | #include <lemon/concepts/graph.h> |
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24 | #include <lemon/concepts/maps.h> |
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25 | #include <lemon/lgf_reader.h> |
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26 | #include <lemon/nagamochi_ibaraki.h> |
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27 | |
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28 | #include "test_tools.h" |
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29 | |
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30 | using namespace lemon; |
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31 | using namespace std; |
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32 | |
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33 | const std::string lgf = |
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34 | "@nodes\n" |
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35 | "label\n" |
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36 | "0\n" |
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37 | "1\n" |
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38 | "2\n" |
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39 | "3\n" |
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40 | "4\n" |
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41 | "5\n" |
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42 | "@edges\n" |
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43 | " cap1 cap2 cap3\n" |
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44 | "0 1 1 1 1 \n" |
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45 | "0 2 2 2 4 \n" |
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46 | "1 2 4 4 4 \n" |
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47 | "3 4 1 1 1 \n" |
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48 | "3 5 2 2 4 \n" |
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49 | "4 5 4 4 4 \n" |
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50 | "2 3 1 6 6 \n"; |
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51 | |
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52 | void checkNagamochiIbarakiCompile() |
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53 | { |
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54 | typedef int Value; |
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55 | typedef concepts::Graph Graph; |
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56 | |
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57 | typedef Graph::Node Node; |
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58 | typedef Graph::Edge Edge; |
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59 | typedef concepts::ReadMap<Edge, Value> CapMap; |
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60 | typedef concepts::WriteMap<Node, bool> CutMap; |
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61 | |
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62 | Graph g; |
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63 | Node n; |
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64 | CapMap cap; |
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65 | CutMap cut; |
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66 | Value v; |
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67 | bool b; |
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68 | ::lemon::ignore_unused_variable_warning(v,b); |
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69 | |
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70 | NagamochiIbaraki<Graph, CapMap> ni_test(g, cap); |
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71 | const NagamochiIbaraki<Graph, CapMap>& const_ni_test = ni_test; |
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72 | |
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73 | ni_test.init(); |
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74 | ni_test.start(); |
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75 | b = ni_test.processNextPhase(); |
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76 | ni_test.run(); |
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77 | |
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78 | v = const_ni_test.minCutValue(); |
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79 | v = const_ni_test.minCutMap(cut); |
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80 | } |
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81 | |
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82 | template <typename Graph, typename CapMap, typename CutMap> |
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83 | typename CapMap::Value |
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84 | cutValue(const Graph& graph, const CapMap& cap, const CutMap& cut) |
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85 | { |
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86 | typename CapMap::Value sum = 0; |
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87 | for (typename Graph::EdgeIt e(graph); e != INVALID; ++e) { |
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88 | if (cut[graph.u(e)] != cut[graph.v(e)]) { |
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89 | sum += cap[e]; |
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90 | } |
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91 | } |
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92 | return sum; |
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93 | } |
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94 | |
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95 | int main() { |
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96 | SmartGraph graph; |
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97 | SmartGraph::EdgeMap<int> cap1(graph), cap2(graph), cap3(graph); |
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98 | SmartGraph::NodeMap<bool> cut(graph); |
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99 | |
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100 | istringstream input(lgf); |
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101 | graphReader(graph, input) |
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102 | .edgeMap("cap1", cap1) |
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103 | .edgeMap("cap2", cap2) |
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104 | .edgeMap("cap3", cap3) |
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105 | .run(); |
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106 | |
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107 | { |
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108 | NagamochiIbaraki<SmartGraph> ni(graph, cap1); |
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109 | ni.run(); |
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110 | ni.minCutMap(cut); |
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111 | |
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112 | check(ni.minCutValue() == 1, "Wrong cut value"); |
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113 | check(ni.minCutValue() == cutValue(graph, cap1, cut), "Wrong cut value"); |
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114 | } |
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115 | { |
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116 | NagamochiIbaraki<SmartGraph> ni(graph, cap2); |
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117 | ni.run(); |
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118 | ni.minCutMap(cut); |
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119 | |
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120 | check(ni.minCutValue() == 3, "Wrong cut value"); |
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121 | check(ni.minCutValue() == cutValue(graph, cap2, cut), "Wrong cut value"); |
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122 | } |
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123 | { |
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124 | NagamochiIbaraki<SmartGraph> ni(graph, cap3); |
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125 | ni.run(); |
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126 | ni.minCutMap(cut); |
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127 | |
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128 | check(ni.minCutValue() == 5, "Wrong cut value"); |
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129 | check(ni.minCutValue() == cutValue(graph, cap3, cut), "Wrong cut value"); |
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130 | } |
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131 | { |
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132 | NagamochiIbaraki<SmartGraph>::SetUnitCapacity::Create ni(graph); |
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133 | ni.run(); |
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134 | ni.minCutMap(cut); |
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135 | |
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136 | ConstMap<SmartGraph::Edge, int> cap4(1); |
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137 | check(ni.minCutValue() == 1, "Wrong cut value"); |
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138 | check(ni.minCutValue() == cutValue(graph, cap4, cut), "Wrong cut value"); |
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139 | } |
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140 | |
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141 | return 0; |
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142 | } |
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