[906] | 1 | /* -*- C++ -*- |
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| 2 | * |
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[1956] | 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) 2003-2006 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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[1359] | 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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[906] | 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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[810] | 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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[921] | 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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[959] | 26 | #include <lemon/concept/maps.h> |
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| 27 | #include <lemon/concept/graph.h> |
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[810] | 28 | |
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| 29 | |
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| 30 | using namespace std; |
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[921] | 31 | using namespace lemon; |
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[810] | 32 | |
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| 33 | void checkCompileKruskal() |
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| 34 | { |
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[959] | 35 | concept::WriteMap<concept::StaticGraph::Edge,bool> w; |
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[810] | 36 | |
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[1557] | 37 | kruskal(concept::StaticGraph(), |
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| 38 | concept::ReadMap<concept::StaticGraph::Edge,int>(), |
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| 39 | w); |
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[810] | 40 | } |
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| 41 | |
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| 42 | int main() { |
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| 43 | |
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| 44 | typedef ListGraph::Node Node; |
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| 45 | typedef ListGraph::Edge Edge; |
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| 46 | typedef ListGraph::NodeIt NodeIt; |
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| 47 | typedef ListGraph::EdgeIt EdgeIt; |
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| 48 | |
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| 49 | ListGraph G; |
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| 50 | |
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| 51 | Node s=G.addNode(); |
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| 52 | Node v1=G.addNode(); |
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| 53 | Node v2=G.addNode(); |
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| 54 | Node v3=G.addNode(); |
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| 55 | Node v4=G.addNode(); |
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| 56 | Node t=G.addNode(); |
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| 57 | |
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| 58 | Edge e1 = G.addEdge(s, v1); |
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| 59 | Edge e2 = G.addEdge(s, v2); |
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| 60 | Edge e3 = G.addEdge(v1, v2); |
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| 61 | Edge e4 = G.addEdge(v2, v1); |
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| 62 | Edge e5 = G.addEdge(v1, v3); |
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| 63 | Edge e6 = G.addEdge(v3, v2); |
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| 64 | Edge e7 = G.addEdge(v2, v4); |
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| 65 | Edge e8 = G.addEdge(v4, v3); |
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| 66 | Edge e9 = G.addEdge(v3, t); |
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| 67 | Edge e10 = G.addEdge(v4, t); |
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| 68 | |
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| 69 | typedef ListGraph::EdgeMap<int> ECostMap; |
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| 70 | typedef ListGraph::EdgeMap<bool> EBoolMap; |
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| 71 | |
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| 72 | ECostMap edge_cost_map(G, 2); |
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| 73 | EBoolMap tree_map(G); |
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| 74 | |
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| 75 | |
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| 76 | //Test with const map. |
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[1557] | 77 | check(kruskal(G, ConstMap<ListGraph::Edge,int>(2), tree_map)==10, |
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[810] | 78 | "Total cost should be 10"); |
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| 79 | //Test with a edge map (filled with uniform costs). |
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[1557] | 80 | check(kruskal(G, edge_cost_map, tree_map)==10, |
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[810] | 81 | "Total cost should be 10"); |
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| 82 | |
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| 83 | edge_cost_map.set(e1, -10); |
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| 84 | edge_cost_map.set(e2, -9); |
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| 85 | edge_cost_map.set(e3, -8); |
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| 86 | edge_cost_map.set(e4, -7); |
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| 87 | edge_cost_map.set(e5, -6); |
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| 88 | edge_cost_map.set(e6, -5); |
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| 89 | edge_cost_map.set(e7, -4); |
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| 90 | edge_cost_map.set(e8, -3); |
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| 91 | edge_cost_map.set(e9, -2); |
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| 92 | edge_cost_map.set(e10, -1); |
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| 93 | |
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[1557] | 94 | vector<Edge> tree_edge_vec(5); |
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[810] | 95 | |
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| 96 | //Test with a edge map and inserter. |
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[1557] | 97 | check(kruskal(G, edge_cost_map, |
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| 98 | tree_edge_vec.begin()) |
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[810] | 99 | ==-31, |
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| 100 | "Total cost should be -31."); |
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[1557] | 101 | |
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[885] | 102 | tree_edge_vec.clear(); |
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| 103 | |
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[1557] | 104 | check(kruskal(G, edge_cost_map, |
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| 105 | back_inserter(tree_edge_vec)) |
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| 106 | ==-31, |
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| 107 | "Total cost should be -31."); |
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| 108 | |
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| 109 | tree_edge_vec.clear(); |
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| 110 | |
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[885] | 111 | //The above test could also be coded like this: |
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| 112 | check(kruskal(G, |
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| 113 | makeKruskalMapInput(G, edge_cost_map), |
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| 114 | makeKruskalSequenceOutput(back_inserter(tree_edge_vec))) |
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| 115 | ==-31, |
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| 116 | "Total cost should be -31."); |
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| 117 | |
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[810] | 118 | check(tree_edge_vec.size()==5,"The tree should have 5 edges."); |
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| 119 | |
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| 120 | check(tree_edge_vec[0]==e1 && |
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| 121 | tree_edge_vec[1]==e2 && |
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| 122 | tree_edge_vec[2]==e5 && |
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| 123 | tree_edge_vec[3]==e7 && |
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| 124 | tree_edge_vec[4]==e9, |
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| 125 | "Wrong tree."); |
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| 126 | |
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| 127 | return 0; |
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| 128 | } |
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