[103] | 1 | /* -*- C++ -*- |
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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) 2003-2008 |
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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 <iostream> |
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| 20 | #include <vector> |
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| 21 | |
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| 22 | #include "test_tools.h" |
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| 23 | #include <lemon/maps.h> |
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| 24 | #include <lemon/kruskal.h> |
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| 25 | #include <lemon/list_graph.h> |
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| 26 | |
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| 27 | #include <lemon/concepts/maps.h> |
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| 28 | #include <lemon/concepts/digraph.h> |
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| 29 | #include <lemon/concepts/graph.h> |
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| 30 | |
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| 31 | |
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| 32 | using namespace std; |
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| 33 | using namespace lemon; |
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| 34 | |
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| 35 | void checkCompileKruskal() |
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| 36 | { |
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| 37 | concepts::WriteMap<concepts::Digraph::Arc,bool> w; |
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| 38 | concepts::WriteMap<concepts::Graph::Edge,bool> uw; |
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| 39 | |
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| 40 | concepts::ReadMap<concepts::Digraph::Arc,int> r; |
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| 41 | concepts::ReadMap<concepts::Graph::Edge,int> ur; |
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| 42 | |
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| 43 | concepts::Digraph g; |
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| 44 | concepts::Graph ug; |
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| 45 | |
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| 46 | kruskal(g, r, w); |
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| 47 | kruskal(ug, ur, uw); |
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| 48 | |
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| 49 | std::vector<std::pair<concepts::Digraph::Arc, int> > rs; |
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| 50 | std::vector<std::pair<concepts::Graph::Edge, int> > urs; |
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| 51 | |
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| 52 | kruskal(g, rs, w); |
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| 53 | kruskal(ug, urs, uw); |
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| 54 | |
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| 55 | std::vector<concepts::Digraph::Arc> ws; |
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| 56 | std::vector<concepts::Graph::Edge> uws; |
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| 57 | |
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| 58 | kruskal(g, r, ws.begin()); |
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| 59 | kruskal(ug, ur, uws.begin()); |
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| 60 | |
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| 61 | } |
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| 62 | |
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| 63 | int main() { |
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| 64 | |
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| 65 | typedef ListGraph::Node Node; |
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| 66 | typedef ListGraph::Edge Edge; |
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| 67 | typedef ListGraph::NodeIt NodeIt; |
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| 68 | typedef ListGraph::ArcIt ArcIt; |
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| 69 | |
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| 70 | ListGraph G; |
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| 71 | |
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| 72 | Node s=G.addNode(); |
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| 73 | Node v1=G.addNode(); |
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| 74 | Node v2=G.addNode(); |
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| 75 | Node v3=G.addNode(); |
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| 76 | Node v4=G.addNode(); |
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| 77 | Node t=G.addNode(); |
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| 78 | |
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| 79 | Edge e1 = G.addEdge(s, v1); |
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| 80 | Edge e2 = G.addEdge(s, v2); |
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| 81 | Edge e3 = G.addEdge(v1, v2); |
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| 82 | Edge e4 = G.addEdge(v2, v1); |
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| 83 | Edge e5 = G.addEdge(v1, v3); |
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| 84 | Edge e6 = G.addEdge(v3, v2); |
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| 85 | Edge e7 = G.addEdge(v2, v4); |
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| 86 | Edge e8 = G.addEdge(v4, v3); |
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| 87 | Edge e9 = G.addEdge(v3, t); |
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| 88 | Edge e10 = G.addEdge(v4, t); |
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| 89 | |
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| 90 | typedef ListGraph::EdgeMap<int> ECostMap; |
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| 91 | typedef ListGraph::EdgeMap<bool> EBoolMap; |
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| 92 | |
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| 93 | ECostMap edge_cost_map(G, 2); |
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| 94 | EBoolMap tree_map(G); |
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| 95 | |
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| 96 | |
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| 97 | //Test with const map. |
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| 98 | check(kruskal(G, ConstMap<ListGraph::Edge,int>(2), tree_map)==10, |
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| 99 | "Total cost should be 10"); |
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| 100 | //Test with a edge map (filled with uniform costs). |
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| 101 | check(kruskal(G, edge_cost_map, tree_map)==10, |
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| 102 | "Total cost should be 10"); |
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| 103 | |
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| 104 | edge_cost_map.set(e1, -10); |
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| 105 | edge_cost_map.set(e2, -9); |
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| 106 | edge_cost_map.set(e3, -8); |
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| 107 | edge_cost_map.set(e4, -7); |
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| 108 | edge_cost_map.set(e5, -6); |
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| 109 | edge_cost_map.set(e6, -5); |
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| 110 | edge_cost_map.set(e7, -4); |
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| 111 | edge_cost_map.set(e8, -3); |
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| 112 | edge_cost_map.set(e9, -2); |
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| 113 | edge_cost_map.set(e10, -1); |
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| 114 | |
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| 115 | vector<Edge> tree_edge_vec(5); |
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| 116 | |
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| 117 | //Test with a edge map and inserter. |
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| 118 | check(kruskal(G, edge_cost_map, |
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| 119 | tree_edge_vec.begin()) |
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| 120 | ==-31, |
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| 121 | "Total cost should be -31."); |
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| 122 | |
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| 123 | tree_edge_vec.clear(); |
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| 124 | |
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| 125 | check(kruskal(G, edge_cost_map, |
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| 126 | back_inserter(tree_edge_vec)) |
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| 127 | ==-31, |
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| 128 | "Total cost should be -31."); |
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| 129 | |
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| 130 | // tree_edge_vec.clear(); |
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| 131 | |
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| 132 | // //The above test could also be coded like this: |
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| 133 | // check(kruskal(G, |
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| 134 | // makeKruskalMapInput(G, edge_cost_map), |
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| 135 | // makeKruskalSequenceOutput(back_inserter(tree_edge_vec))) |
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| 136 | // ==-31, |
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| 137 | // "Total cost should be -31."); |
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| 138 | |
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| 139 | check(tree_edge_vec.size()==5,"The tree should have 5 edges."); |
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| 140 | |
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| 141 | check(tree_edge_vec[0]==e1 && |
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| 142 | tree_edge_vec[1]==e2 && |
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| 143 | tree_edge_vec[2]==e5 && |
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| 144 | tree_edge_vec[3]==e7 && |
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| 145 | tree_edge_vec[4]==e9, |
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| 146 | "Wrong tree."); |
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| 147 | |
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| 148 | return 0; |
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| 149 | } |
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