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) 2003-2006 |
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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 | #ifndef LEMON_FULL_GRAPH_H |
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20 | #define LEMON_FULL_GRAPH_H |
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21 | |
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22 | #include <cmath> |
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23 | |
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24 | #include <lemon/bits/base_extender.h> |
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25 | #include <lemon/bits/graph_extender.h> |
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26 | |
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27 | #include <lemon/bits/invalid.h> |
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28 | #include <lemon/bits/utility.h> |
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29 | |
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30 | |
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31 | ///\ingroup graphs |
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32 | ///\file |
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33 | ///\brief FullGraph and FullUGraph classes. |
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34 | |
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35 | |
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36 | namespace lemon { |
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37 | |
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38 | class FullGraphBase { |
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39 | int _nodeNum; |
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40 | int _edgeNum; |
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41 | public: |
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42 | |
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43 | typedef FullGraphBase Graph; |
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44 | |
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45 | class Node; |
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46 | class Edge; |
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47 | |
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48 | protected: |
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49 | |
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50 | FullGraphBase() {} |
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51 | |
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52 | void construct(int n) { _nodeNum = n; _edgeNum = n * n; } |
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53 | |
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54 | public: |
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55 | |
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56 | typedef True NodeNumTag; |
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57 | typedef True EdgeNumTag; |
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58 | |
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59 | Node operator()(int index) const { return Node(index); } |
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60 | int index(const Node& node) const { return node.id; } |
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61 | |
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62 | Edge edge(const Node& u, const Node& v) const { |
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63 | return Edge(*this, u.id, v.id); |
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64 | } |
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65 | |
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66 | int nodeNum() const { return _nodeNum; } |
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67 | int edgeNum() const { return _edgeNum; } |
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68 | |
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69 | int maxNodeId() const { return _nodeNum-1; } |
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70 | int maxEdgeId() const { return _edgeNum-1; } |
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71 | |
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72 | Node source(Edge e) const { return e.id % _nodeNum; } |
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73 | Node target(Edge e) const { return e.id / _nodeNum; } |
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74 | |
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75 | |
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76 | static int id(Node v) { return v.id; } |
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77 | static int id(Edge e) { return e.id; } |
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78 | |
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79 | static Node nodeFromId(int id) { return Node(id);} |
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80 | |
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81 | static Edge edgeFromId(int id) { return Edge(id);} |
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82 | |
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83 | typedef True FindEdgeTag; |
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84 | |
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85 | Edge findEdge(Node u,Node v, Edge prev = INVALID) const { |
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86 | return prev.id == -1 ? Edge(*this, u.id, v.id) : INVALID; |
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87 | } |
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88 | |
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89 | |
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90 | class Node { |
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91 | friend class FullGraphBase; |
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92 | |
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93 | protected: |
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94 | int id; |
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95 | Node(int _id) : id(_id) {} |
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96 | public: |
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97 | Node() {} |
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98 | Node (Invalid) : id(-1) {} |
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99 | bool operator==(const Node node) const {return id == node.id;} |
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100 | bool operator!=(const Node node) const {return id != node.id;} |
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101 | bool operator<(const Node node) const {return id < node.id;} |
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102 | }; |
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103 | |
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104 | |
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105 | |
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106 | class Edge { |
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107 | friend class FullGraphBase; |
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108 | |
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109 | protected: |
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110 | int id; // _nodeNum * target + source; |
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111 | |
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112 | Edge(int _id) : id(_id) {} |
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113 | |
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114 | Edge(const FullGraphBase& _graph, int source, int target) |
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115 | : id(_graph._nodeNum * target+source) {} |
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116 | public: |
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117 | Edge() { } |
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118 | Edge (Invalid) { id = -1; } |
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119 | bool operator==(const Edge edge) const {return id == edge.id;} |
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120 | bool operator!=(const Edge edge) const {return id != edge.id;} |
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121 | bool operator<(const Edge edge) const {return id < edge.id;} |
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122 | }; |
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123 | |
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124 | void first(Node& node) const { |
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125 | node.id = _nodeNum-1; |
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126 | } |
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127 | |
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128 | static void next(Node& node) { |
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129 | --node.id; |
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130 | } |
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131 | |
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132 | void first(Edge& edge) const { |
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133 | edge.id = _edgeNum-1; |
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134 | } |
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135 | |
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136 | static void next(Edge& edge) { |
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137 | --edge.id; |
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138 | } |
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139 | |
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140 | void firstOut(Edge& edge, const Node& node) const { |
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141 | edge.id = _edgeNum + node.id - _nodeNum; |
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142 | } |
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143 | |
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144 | void nextOut(Edge& edge) const { |
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145 | edge.id -= _nodeNum; |
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146 | if (edge.id < 0) edge.id = -1; |
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147 | } |
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148 | |
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149 | void firstIn(Edge& edge, const Node& node) const { |
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150 | edge.id = node.id * _nodeNum; |
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151 | } |
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152 | |
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153 | void nextIn(Edge& edge) const { |
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154 | ++edge.id; |
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155 | if (edge.id % _nodeNum == 0) edge.id = -1; |
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156 | } |
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157 | |
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158 | }; |
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159 | |
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160 | typedef GraphExtender<FullGraphBase> ExtendedFullGraphBase; |
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161 | |
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162 | /// \ingroup graphs |
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163 | /// |
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164 | /// \brief A full graph class. |
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165 | /// |
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166 | /// This is a simple and fast directed full graph implementation. |
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167 | /// It is completely static, so you can neither add nor delete either |
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168 | /// edges or nodes. |
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169 | /// Thus it conforms to |
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170 | /// the \ref concept::Graph "Graph" concept |
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171 | /// \sa concept::Graph. |
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172 | /// |
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173 | /// \sa FullUGraph |
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174 | /// |
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175 | /// \author Alpar Juttner |
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176 | class FullGraph : public ExtendedFullGraphBase { |
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177 | public: |
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178 | |
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179 | typedef ExtendedFullGraphBase Parent; |
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180 | |
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181 | /// \brief Constructor |
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182 | FullGraph() { construct(0); } |
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183 | |
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184 | /// \brief Constructor |
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185 | /// |
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186 | FullGraph(int n) { construct(n); } |
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187 | |
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188 | /// \brief Resize the graph |
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189 | /// |
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190 | /// Resize the graph. The function will fully destroy and build the graph. |
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191 | /// This cause that the maps of the graph will reallocated |
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192 | /// automatically and the previous values will be lost. |
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193 | void resize(int n) { |
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194 | Parent::getNotifier(Edge()).clear(); |
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195 | Parent::getNotifier(Node()).clear(); |
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196 | construct(n); |
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197 | Parent::getNotifier(Node()).build(); |
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198 | Parent::getNotifier(Edge()).build(); |
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199 | } |
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200 | |
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201 | /// \brief Returns the node with the given index. |
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202 | /// |
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203 | /// Returns the node with the given index. Because it is a |
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204 | /// static size graph the node's of the graph can be indiced |
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205 | /// by the range from 0 to \e nodeNum()-1 and the index of |
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206 | /// the node can accessed by the \e index() member. |
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207 | Node operator()(int index) const { return Parent::operator()(index); } |
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208 | |
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209 | /// \brief Returns the index of the node. |
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210 | /// |
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211 | /// Returns the index of the node. Because it is a |
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212 | /// static size graph the node's of the graph can be indiced |
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213 | /// by the range from 0 to \e nodeNum()-1 and the index of |
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214 | /// the node can accessed by the \e index() member. |
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215 | int index(const Node& node) const { return Parent::index(node); } |
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216 | |
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217 | /// \brief Returns the edge connects the given nodes. |
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218 | /// |
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219 | /// Returns the edge connects the given nodes. |
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220 | Edge edge(const Node& u, const Node& v) const { |
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221 | return Parent::edge(u, v); |
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222 | } |
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223 | |
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224 | /// \brief Number of nodes. |
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225 | int nodeNum() const { return Parent::nodeNum(); } |
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226 | /// \brief Number of edges. |
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227 | int edgeNum() const { return Parent::edgeNum(); } |
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228 | }; |
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229 | |
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230 | |
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231 | class FullUGraphBase { |
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232 | int _nodeNum; |
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233 | int _edgeNum; |
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234 | public: |
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235 | |
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236 | typedef FullUGraphBase Graph; |
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237 | |
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238 | class Node; |
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239 | class Edge; |
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240 | |
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241 | protected: |
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242 | |
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243 | FullUGraphBase() {} |
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244 | |
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245 | void construct(int n) { _nodeNum = n; _edgeNum = n * (n - 1) / 2; } |
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246 | |
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247 | public: |
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248 | |
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249 | |
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250 | Node operator()(int index) const { return Node(index); } |
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251 | int index(const Node& node) const { return node.id; } |
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252 | |
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253 | Edge edge(const Node& u, const Node& v) const { |
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254 | return Edge(u.id * (u.id - 1) / 2 + v.id); |
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255 | } |
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256 | |
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257 | typedef True NodeNumTag; |
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258 | typedef True EdgeNumTag; |
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259 | |
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260 | int nodeNum() const { return _nodeNum; } |
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261 | int edgeNum() const { return _edgeNum; } |
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262 | |
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263 | int maxNodeId() const { return _nodeNum-1; } |
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264 | int maxEdgeId() const { return _edgeNum-1; } |
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265 | |
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266 | static Node nodeFromId(int id) { return Node(id);} |
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267 | static Edge edgeFromId(int id) { return Edge(id);} |
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268 | |
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269 | Node source(Edge e) const { |
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270 | /// \todo we may do it faster |
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271 | return Node(((int)sqrt((double)(1 + 8 * e.id)) + 1) / 2); |
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272 | } |
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273 | |
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274 | Node target(Edge e) const { |
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275 | int source = ((int)sqrt((double)(1 + 8 * e.id)) + 1) / 2;; |
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276 | return Node(e.id - (source) * (source - 1) / 2); |
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277 | } |
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278 | |
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279 | static int id(Node v) { return v.id; } |
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280 | static int id(Edge e) { return e.id; } |
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281 | |
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282 | Edge findEdge(Node u, Node v, Edge prev = INVALID) const { |
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283 | if (prev.id != -1 || u.id <= v.id) return Edge(-1); |
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284 | return Edge(u.id * (u.id - 1) / 2 + v.id); |
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285 | } |
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286 | |
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287 | typedef True FindEdgeTag; |
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288 | |
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289 | |
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290 | class Node { |
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291 | friend class FullUGraphBase; |
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292 | |
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293 | protected: |
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294 | int id; |
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295 | Node(int _id) { id = _id;} |
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296 | public: |
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297 | Node() {} |
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298 | Node (Invalid) { id = -1; } |
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299 | bool operator==(const Node node) const {return id == node.id;} |
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300 | bool operator!=(const Node node) const {return id != node.id;} |
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301 | bool operator<(const Node node) const {return id < node.id;} |
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302 | }; |
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303 | |
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304 | |
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305 | |
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306 | class Edge { |
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307 | friend class FullUGraphBase; |
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308 | |
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309 | protected: |
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310 | int id; // _nodeNum * target + source; |
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311 | |
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312 | Edge(int _id) : id(_id) {} |
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313 | |
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314 | public: |
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315 | Edge() { } |
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316 | Edge (Invalid) { id = -1; } |
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317 | bool operator==(const Edge edge) const {return id == edge.id;} |
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318 | bool operator!=(const Edge edge) const {return id != edge.id;} |
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319 | bool operator<(const Edge edge) const {return id < edge.id;} |
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320 | }; |
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321 | |
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322 | void first(Node& node) const { |
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323 | node.id = _nodeNum - 1; |
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324 | } |
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325 | |
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326 | static void next(Node& node) { |
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327 | --node.id; |
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328 | } |
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329 | |
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330 | void first(Edge& edge) const { |
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331 | edge.id = _edgeNum - 1; |
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332 | } |
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333 | |
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334 | static void next(Edge& edge) { |
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335 | --edge.id; |
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336 | } |
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337 | |
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338 | void firstOut(Edge& edge, const Node& node) const { |
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339 | int src = node.id; |
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340 | int trg = 0; |
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341 | edge.id = (trg < src ? src * (src - 1) / 2 + trg : -1); |
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342 | } |
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343 | |
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344 | /// \todo with specialized iterators we can make faster iterating |
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345 | void nextOut(Edge& edge) const { |
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346 | int src = source(edge).id; |
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347 | int trg = target(edge).id; |
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348 | ++trg; |
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349 | edge.id = (trg < src ? src * (src - 1) / 2 + trg : -1); |
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350 | } |
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351 | |
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352 | void firstIn(Edge& edge, const Node& node) const { |
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353 | int src = node.id + 1; |
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354 | int trg = node.id; |
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355 | edge.id = (src < _nodeNum ? src * (src - 1) / 2 + trg : -1); |
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356 | } |
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357 | |
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358 | void nextIn(Edge& edge) const { |
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359 | int src = source(edge).id; |
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360 | int trg = target(edge).id; |
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361 | ++src; |
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362 | edge.id = (src < _nodeNum ? src * (src - 1) / 2 + trg : -1); |
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363 | } |
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364 | |
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365 | }; |
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366 | |
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367 | typedef UGraphExtender<UndirGraphExtender<FullUGraphBase> > |
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368 | ExtendedFullUGraphBase; |
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369 | |
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370 | /// \ingroup graphs |
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371 | /// |
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372 | /// \brief An undirected full graph class. |
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373 | /// |
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374 | /// This is a simple and fast undirected full graph implementation. |
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375 | /// It is completely static, so you can neither add nor delete either |
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376 | /// edges or nodes. |
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377 | /// |
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378 | /// The main difference beetween the \e FullGraph and \e FullUGraph class |
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379 | /// is that this class conforms to the undirected graph concept and |
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380 | /// it does not contain the loop edges. |
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381 | /// |
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382 | /// \sa FullGraph |
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383 | /// |
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384 | /// \author Balazs Dezso |
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385 | class FullUGraph : public ExtendedFullUGraphBase { |
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386 | public: |
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387 | |
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388 | typedef ExtendedFullUGraphBase Parent; |
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389 | |
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390 | /// \brief Constructor |
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391 | FullUGraph() { construct(0); } |
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392 | |
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393 | /// \brief Constructor |
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394 | FullUGraph(int n) { construct(n); } |
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395 | |
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396 | /// \brief Resize the graph |
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397 | /// |
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398 | /// Resize the graph. The function will fully destroy and build the graph. |
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399 | /// This cause that the maps of the graph will reallocated |
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400 | /// automatically and the previous values will be lost. |
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401 | void resize(int n) { |
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402 | Parent::getNotifier(Edge()).clear(); |
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403 | Parent::getNotifier(UEdge()).clear(); |
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404 | Parent::getNotifier(Node()).clear(); |
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405 | construct(n); |
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406 | Parent::getNotifier(Node()).build(); |
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407 | Parent::getNotifier(UEdge()).build(); |
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408 | Parent::getNotifier(Edge()).build(); |
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409 | } |
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410 | |
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411 | /// \brief Returns the node with the given index. |
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412 | /// |
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413 | /// Returns the node with the given index. Because it is a |
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414 | /// static size graph the node's of the graph can be indiced |
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415 | /// by the range from 0 to \e nodeNum()-1 and the index of |
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416 | /// the node can accessed by the \e index() member. |
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417 | Node operator()(int index) const { return Parent::operator()(index); } |
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418 | |
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419 | /// \brief Returns the index of the node. |
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420 | /// |
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421 | /// Returns the index of the node. Because it is a |
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422 | /// static size graph the node's of the graph can be indiced |
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423 | /// by the range from 0 to \e nodeNum()-1 and the index of |
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424 | /// the node can accessed by the \e index() member. |
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425 | int index(const Node& node) const { return Parent::index(node); } |
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426 | |
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427 | /// \brief Number of nodes. |
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428 | int nodeNum() const { return Parent::nodeNum(); } |
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429 | /// \brief Number of edges. |
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430 | int edgeNum() const { return Parent::edgeNum(); } |
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431 | /// \brief Number of undirected edges. |
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432 | int uEdgeNum() const { return Parent::uEdgeNum(); } |
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433 | |
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434 | /// \brief Returns the edge connects the given nodes. |
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435 | /// |
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436 | /// Returns the edge connects the given nodes. |
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437 | Edge edge(const Node& u, const Node& v) const { |
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438 | if (Parent::index(u) > Parent::index(v)) { |
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439 | return Parent::direct(Parent::edge(u, v), true); |
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440 | } else if (Parent::index(u) == Parent::index(v)) { |
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441 | return INVALID; |
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442 | } else { |
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443 | return Parent::direct(Parent::edge(v, u), false); |
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444 | } |
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445 | } |
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446 | |
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447 | /// \brief Returns the undirected edge connects the given nodes. |
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448 | /// |
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449 | /// Returns the undirected edge connects the given nodes. |
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450 | UEdge uEdge(const Node& u, const Node& v) const { |
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451 | if (Parent::index(u) > Parent::index(v)) { |
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452 | return Parent::edge(u, v); |
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453 | } else if (Parent::index(u) == Parent::index(v)) { |
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454 | return INVALID; |
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455 | } else { |
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456 | return Parent::edge(v, u); |
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457 | } |
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458 | } |
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459 | }; |
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460 | |
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461 | |
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462 | class FullBpUGraphBase { |
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463 | protected: |
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464 | |
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465 | int _aNodeNum; |
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466 | int _bNodeNum; |
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467 | |
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468 | int _edgeNum; |
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469 | |
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470 | protected: |
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471 | |
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472 | FullBpUGraphBase() {} |
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473 | |
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474 | void construct(int aNodeNum, int bNodeNum) { |
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475 | _aNodeNum = aNodeNum; |
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476 | _bNodeNum = bNodeNum; |
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477 | _edgeNum = aNodeNum * bNodeNum; |
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478 | } |
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479 | |
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480 | public: |
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481 | |
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482 | class NodeSetError : public LogicError { |
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483 | public: |
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484 | virtual const char* what() const throw() { |
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485 | return "lemon::FullBpUGraph::NodeSetError"; |
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486 | } |
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487 | }; |
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488 | |
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489 | class Node { |
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490 | friend class FullBpUGraphBase; |
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491 | protected: |
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492 | int id; |
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493 | |
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494 | Node(int _id) : id(_id) {} |
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495 | public: |
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496 | Node() {} |
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497 | Node(Invalid) { id = -1; } |
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498 | bool operator==(const Node i) const {return id==i.id;} |
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499 | bool operator!=(const Node i) const {return id!=i.id;} |
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500 | bool operator<(const Node i) const {return id<i.id;} |
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501 | }; |
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502 | |
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503 | class UEdge { |
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504 | friend class FullBpUGraphBase; |
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505 | protected: |
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506 | int id; |
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507 | |
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508 | UEdge(int _id) { id = _id;} |
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509 | public: |
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510 | UEdge() {} |
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511 | UEdge (Invalid) { id = -1; } |
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512 | bool operator==(const UEdge i) const {return id==i.id;} |
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513 | bool operator!=(const UEdge i) const {return id!=i.id;} |
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514 | bool operator<(const UEdge i) const {return id<i.id;} |
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515 | }; |
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516 | |
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517 | Node aNode(int index) const { return Node(index << 1); } |
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518 | Node bNode(int index) const { return Node((index << 1) + 1); } |
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519 | |
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520 | int aNodeIndex(const Node& node) const { return node.id >> 1; } |
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521 | int bNodeIndex(const Node& node) const { return node.id >> 1; } |
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522 | |
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523 | UEdge uEdge(const Node& u, const Node& v) const { |
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524 | if (((u.id ^ v.id) & 1) != 1) { |
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525 | return UEdge(-1); |
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526 | } else if ((u.id & 1) == 0) { |
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527 | return UEdge((u.id >> 1) * _bNodeNum + (v.id >> 1)); |
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528 | } else { |
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529 | return UEdge((v.id >> 1) * _bNodeNum + (u.id >> 1)); |
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530 | } |
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531 | } |
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532 | |
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533 | void firstANode(Node& node) const { |
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534 | node.id = 2 * _aNodeNum - 2; |
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535 | if (node.id < 0) node.id = -1; |
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536 | } |
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537 | void nextANode(Node& node) const { |
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538 | node.id -= 2; |
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539 | if (node.id < 0) node.id = -1; |
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540 | } |
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541 | |
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542 | void firstBNode(Node& node) const { |
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543 | node.id = 2 * _bNodeNum - 1; |
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544 | } |
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545 | void nextBNode(Node& node) const { |
---|
546 | node.id -= 2; |
---|
547 | } |
---|
548 | |
---|
549 | void first(Node& node) const { |
---|
550 | if (_aNodeNum > 0) { |
---|
551 | node.id = 2 * _aNodeNum - 2; |
---|
552 | } else { |
---|
553 | node.id = 2 * _bNodeNum - 1; |
---|
554 | } |
---|
555 | } |
---|
556 | void next(Node& node) const { |
---|
557 | node.id -= 2; |
---|
558 | if (node.id == -2) { |
---|
559 | node.id = 2 * _bNodeNum - 1; |
---|
560 | } |
---|
561 | } |
---|
562 | |
---|
563 | void first(UEdge& edge) const { |
---|
564 | edge.id = _edgeNum - 1; |
---|
565 | } |
---|
566 | void next(UEdge& edge) const { |
---|
567 | --edge.id; |
---|
568 | } |
---|
569 | |
---|
570 | void firstFromANode(UEdge& edge, const Node& node) const { |
---|
571 | LEMON_ASSERT((node.id & 1) == 0, NodeSetError()); |
---|
572 | edge.id = (node.id >> 1) * _bNodeNum; |
---|
573 | } |
---|
574 | void nextFromANode(UEdge& edge) const { |
---|
575 | ++(edge.id); |
---|
576 | if (edge.id % _bNodeNum == 0) edge.id = -1; |
---|
577 | } |
---|
578 | |
---|
579 | void firstFromBNode(UEdge& edge, const Node& node) const { |
---|
580 | LEMON_ASSERT((node.id & 1) == 1, NodeSetError()); |
---|
581 | edge.id = (node.id >> 1); |
---|
582 | } |
---|
583 | void nextFromBNode(UEdge& edge) const { |
---|
584 | edge.id += _bNodeNum; |
---|
585 | if (edge.id >= _edgeNum) edge.id = -1; |
---|
586 | } |
---|
587 | |
---|
588 | static int id(const Node& node) { |
---|
589 | return node.id; |
---|
590 | } |
---|
591 | static Node nodeFromId(int id) { |
---|
592 | return Node(id); |
---|
593 | } |
---|
594 | int maxNodeId() const { |
---|
595 | return _aNodeNum > _bNodeNum ? |
---|
596 | _aNodeNum * 2 - 2 : _bNodeNum * 2 - 1; |
---|
597 | } |
---|
598 | |
---|
599 | static int id(const UEdge& edge) { |
---|
600 | return edge.id; |
---|
601 | } |
---|
602 | static UEdge uEdgeFromId(int id) { |
---|
603 | return UEdge(id); |
---|
604 | } |
---|
605 | int maxUEdgeId() const { |
---|
606 | return _edgeNum - 1; |
---|
607 | } |
---|
608 | |
---|
609 | static int aNodeId(const Node& node) { |
---|
610 | return node.id >> 1; |
---|
611 | } |
---|
612 | static Node fromANodeId(int id) { |
---|
613 | return Node(id << 1); |
---|
614 | } |
---|
615 | int maxANodeId() const { |
---|
616 | return _aNodeNum; |
---|
617 | } |
---|
618 | |
---|
619 | static int bNodeId(const Node& node) { |
---|
620 | return node.id >> 1; |
---|
621 | } |
---|
622 | static Node fromBNodeId(int id) { |
---|
623 | return Node((id << 1) + 1); |
---|
624 | } |
---|
625 | int maxBNodeId() const { |
---|
626 | return _bNodeNum; |
---|
627 | } |
---|
628 | |
---|
629 | Node aNode(const UEdge& edge) const { |
---|
630 | return Node((edge.id / _bNodeNum) << 1); |
---|
631 | } |
---|
632 | Node bNode(const UEdge& edge) const { |
---|
633 | return Node(((edge.id % _bNodeNum) << 1) + 1); |
---|
634 | } |
---|
635 | |
---|
636 | static bool aNode(const Node& node) { |
---|
637 | return (node.id & 1) == 0; |
---|
638 | } |
---|
639 | |
---|
640 | static bool bNode(const Node& node) { |
---|
641 | return (node.id & 1) == 1; |
---|
642 | } |
---|
643 | |
---|
644 | |
---|
645 | typedef True NodeNumTag; |
---|
646 | int nodeNum() const { return _aNodeNum + _bNodeNum; } |
---|
647 | int aNodeNum() const { return _aNodeNum; } |
---|
648 | int bNodeNum() const { return _bNodeNum; } |
---|
649 | |
---|
650 | typedef True EdgeNumTag; |
---|
651 | int uEdgeNum() const { return _edgeNum; } |
---|
652 | |
---|
653 | |
---|
654 | typedef True FindEdgeTag; |
---|
655 | UEdge findUEdge(Node u, Node v, UEdge prev = INVALID) const { |
---|
656 | if (prev.id != -1 || ((u.id ^ v.id) & 1) != 1) { |
---|
657 | return UEdge(-1); |
---|
658 | } else if ((u.id & 1) == 0) { |
---|
659 | return UEdge((u.id >> 1) * _bNodeNum + (v.id >> 1)); |
---|
660 | } else { |
---|
661 | return UEdge((v.id >> 1) * _bNodeNum + (u.id >> 1)); |
---|
662 | } |
---|
663 | } |
---|
664 | |
---|
665 | }; |
---|
666 | |
---|
667 | |
---|
668 | typedef BpUGraphExtender<FullBpUGraphBase> ExtendedFullBpUGraphBase; |
---|
669 | |
---|
670 | |
---|
671 | /// \ingroup graphs |
---|
672 | /// |
---|
673 | /// \brief An undirected full bipartite graph class. |
---|
674 | /// |
---|
675 | /// This is a simple and fast bipartite undirected full graph implementation. |
---|
676 | /// It is completely static, so you can neither add nor delete either |
---|
677 | /// edges or nodes. |
---|
678 | /// |
---|
679 | /// \author Balazs Dezso |
---|
680 | class FullBpUGraph : |
---|
681 | public ExtendedFullBpUGraphBase { |
---|
682 | public: |
---|
683 | |
---|
684 | typedef ExtendedFullBpUGraphBase Parent; |
---|
685 | |
---|
686 | FullBpUGraph() { |
---|
687 | Parent::construct(0, 0); |
---|
688 | } |
---|
689 | |
---|
690 | FullBpUGraph(int aNodeNum, int bNodeNum) { |
---|
691 | Parent::construct(aNodeNum, bNodeNum); |
---|
692 | } |
---|
693 | |
---|
694 | /// \brief Resize the graph |
---|
695 | /// |
---|
696 | /// Resize the graph |
---|
697 | void resize(int n, int m) { |
---|
698 | Parent::getNotifier(Edge()).clear(); |
---|
699 | Parent::getNotifier(UEdge()).clear(); |
---|
700 | Parent::getNotifier(Node()).clear(); |
---|
701 | Parent::getNotifier(ANode()).clear(); |
---|
702 | Parent::getNotifier(BNode()).clear(); |
---|
703 | construct(n, m); |
---|
704 | Parent::getNotifier(ANode()).build(); |
---|
705 | Parent::getNotifier(BNode()).build(); |
---|
706 | Parent::getNotifier(Node()).build(); |
---|
707 | Parent::getNotifier(UEdge()).build(); |
---|
708 | Parent::getNotifier(Edge()).build(); |
---|
709 | } |
---|
710 | |
---|
711 | /// \brief Number of nodes. |
---|
712 | int nodeNum() const { return Parent::nodeNum(); } |
---|
713 | /// \brief Number of A-nodes. |
---|
714 | int aNodeNum() const { return Parent::aNodeNum(); } |
---|
715 | /// \brief Number of B-nodes. |
---|
716 | int bNodeNum() const { return Parent::bNodeNum(); } |
---|
717 | /// \brief Number of edges. |
---|
718 | int edgeNum() const { return Parent::edgeNum(); } |
---|
719 | /// \brief Number of undirected edges. |
---|
720 | int uEdgeNum() const { return Parent::uEdgeNum(); } |
---|
721 | |
---|
722 | |
---|
723 | using Parent::aNode; |
---|
724 | using Parent::bNode; |
---|
725 | |
---|
726 | /// \brief Returns the A-node with the given index. |
---|
727 | /// |
---|
728 | /// Returns the A-node with the given index. Because it is a |
---|
729 | /// static size graph the node's of the graph can be indiced |
---|
730 | /// by the range from 0 to \e aNodeNum()-1 and the index of |
---|
731 | /// the node can accessed by the \e aNodeIndex() member. |
---|
732 | Node aNode(int index) const { return Parent::aNode(index); } |
---|
733 | |
---|
734 | /// \brief Returns the B-node with the given index. |
---|
735 | /// |
---|
736 | /// Returns the B-node with the given index. Because it is a |
---|
737 | /// static size graph the node's of the graph can be indiced |
---|
738 | /// by the range from 0 to \e bNodeNum()-1 and the index of |
---|
739 | /// the node can accessed by the \e bNodeIndex() member. |
---|
740 | Node bNode(int index) const { return Parent::bNode(index); } |
---|
741 | |
---|
742 | /// \brief Returns the index of the A-node. |
---|
743 | /// |
---|
744 | /// Returns the index of the A-node. Because it is a |
---|
745 | /// static size graph the node's of the graph can be indiced |
---|
746 | /// by the range from 0 to \e aNodeNum()-1 and the index of |
---|
747 | /// the node can accessed by the \e aNodeIndex() member. |
---|
748 | int aNodeIndex(const Node& node) const { return Parent::aNodeIndex(node); } |
---|
749 | |
---|
750 | /// \brief Returns the index of the B-node. |
---|
751 | /// |
---|
752 | /// Returns the index of the B-node. Because it is a |
---|
753 | /// static size graph the node's of the graph can be indiced |
---|
754 | /// by the range from 0 to \e bNodeNum()-1 and the index of |
---|
755 | /// the node can accessed by the \e bNodeIndex() member. |
---|
756 | int bNodeIndex(const Node& node) const { return Parent::bNodeIndex(node); } |
---|
757 | |
---|
758 | /// \brief Returns the edge connects the given nodes. |
---|
759 | /// |
---|
760 | /// Returns the edge connects the given nodes. |
---|
761 | Edge edge(const Node& u, const Node& v) const { |
---|
762 | UEdge uedge = Parent::uEdge(u, v); |
---|
763 | if (uedge != INVALID) { |
---|
764 | return Parent::direct(uedge, Parent::aNode(u)); |
---|
765 | } else { |
---|
766 | return INVALID; |
---|
767 | } |
---|
768 | } |
---|
769 | |
---|
770 | /// \brief Returns the undirected edge connects the given nodes. |
---|
771 | /// |
---|
772 | /// Returns the undirected edge connects the given nodes. |
---|
773 | UEdge uEdge(const Node& u, const Node& v) const { |
---|
774 | return Parent::uEdge(u, v); |
---|
775 | } |
---|
776 | }; |
---|
777 | |
---|
778 | } //namespace lemon |
---|
779 | |
---|
780 | |
---|
781 | #endif //LEMON_FULL_GRAPH_H |
---|