.
7 #include <LEDA/graph.h>
8 #include <LEDA/mcb_matching.h>
11 #include <leda_graph_wrapper.h>
12 #include <list_graph.h>
14 #include <time_measure.h>
15 #include <edmonds_karp.h>
18 * Inicializalja a veletlenszamgeneratort.
19 * Figyelem, ez nem jo igazi random szamokhoz,
20 * erre ne bizzad a titkaidat!
24 unsigned int seed = getpid();
32 * Egy veletlen int-et ad vissza 0 es m-1 kozott.
36 return int( double(m) * rand() / (RAND_MAX + 1.0) );
47 typedef LedaGraphWrapper<leda::graph> Graph;
49 // typedef ListGraph Graph;
52 typedef Graph::Node Node;
53 typedef Graph::NodeIt NodeIt;
54 typedef Graph::Edge Edge;
55 typedef Graph::EdgeIt EdgeIt;
56 typedef Graph::OutEdgeIt OutEdgeIt;
57 typedef Graph::InEdgeIt InEdgeIt;
60 //Graph::EdgeMap<int> cap(G);
61 //readDimacsMaxFlow(std::cin, G, s, t, cap);
62 std::vector<Node> s_nodes;
63 std::vector<Node> t_nodes;
66 cout << "number of nodes in the first color class=";
69 cout << "number of nodes in the second color class=";
72 cout << "number of edges=";
76 for(int i=0; i<a; ++i) {
77 s_nodes.push_back(G.addNode());
79 for(int i=0; i<a; ++i) {
80 t_nodes.push_back(G.addNode());
83 for(int i=0; i<m; ++i) {
84 G.addEdge(s_nodes[random(a)], t_nodes[random(b)]);
87 // G.addEdge(s_nodes[1], t_nodes[5-4]);
88 // G.addEdge(s_nodes[1], t_nodes[5-4]);
89 // G.addEdge(s_nodes[1], t_nodes[4-4]);
90 // G.addEdge(s_nodes[1], t_nodes[4-4]);
91 // G.addEdge(s_nodes[2], t_nodes[4-4]);
92 // G.addEdge(s_nodes[3], t_nodes[4-4]);
95 Graph::NodeMap<bool> s_map(G); //false
96 Graph::NodeMap<bool> t_map(G); //false
98 for(int i=0; i<a; ++i) s_map.set(s_nodes[i], true);
99 for(int i=0; i<b; ++i) t_map.set(t_nodes[i], true);
101 // cout << "bfs and dfs iterator demo on the directed graph" << endl;
102 // for(NodeIt n=G.first<NodeIt>(); G.valid(n); G.next(n)) {
103 // cout << G.id(n) << ": ";
104 // cout << "out edges: ";
105 // for(OutEdgeIt e=G.first<OutEdgeIt>(n); G.valid(e); G.next(e))
106 // cout << G.id(G.tail(e)) << "->" << G.id(G.head(e)) << " ";
107 // cout << "in edges: ";
108 // for(InEdgeIt e=G.first<InEdgeIt>(n); G.valid(e); G.next(e))
109 // cout << G.id(G.tail(e)) << "->" << G.id(G.head(e)) << " ";
115 std::cout << "on-the-fly max bipartite matching demo on wrapped leda graph..." << std::endl;
116 Graph::EdgeMap<int> flow(G); //0 flow
117 Graph::EdgeMap<int> cap(G, 1);
122 MaxMatching<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > max_flow_test(G, s_map, t_map, flow, cap);
124 while (max_flow_test.augmentOnShortestPath()) {
125 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
126 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
127 // std::cout<<std::endl;
131 // std::cout << "maximum matching: "<< std::endl;
132 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
134 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
135 // std::cout<<std::endl;
136 // std::cout << "edges which are not in this maximum matching: "<< std::endl;
137 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
139 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
140 // std::cout<<std::endl;
142 std::cout << "elapsed time: " << ts << std::endl;
143 std::cout << "number of augmentation phases: " << i << std::endl;
144 std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl;
148 std::cout << "on-the-fly max bipartite matching demo (Hopcroft-Karp) on wrapped leda graph..." << std::endl;
149 Graph::EdgeMap<int> flow(G); //0 flow
150 Graph::EdgeMap<int> cap(G, 1);
155 MaxMatching<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > max_flow_test(G, s_map, t_map, flow, cap);
157 while (max_flow_test.augmentOnBlockingFlow2()) {
158 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
159 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
160 // std::cout<<std::endl;
164 // std::cout << "maximum matching: "<< std::endl;
165 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
167 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
168 // std::cout<<std::endl;
169 // std::cout << "edges which are not in this maximum matching: "<< std::endl;
170 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
172 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
173 // std::cout<<std::endl;
175 std::cout << "elapsed time: " << ts << std::endl;
176 std::cout << "number of augmentation phases: " << i << std::endl;
177 std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl;
181 std::cout << "max bipartite matching (LEDA)..." << std::endl;
182 //Graph::EdgeMap<int> flow(G); //0 flow
183 //Graph::EdgeMap<int> cap(G, 1);
188 //MaxMatching<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > max_flow_test(G, s_map, t_map, flow, cap);
190 //while (max_flow_test.augmentOnShortestPath()) { ++i; }
192 leda_list<leda_edge> l=MAX_CARD_BIPARTITE_MATCHING(g);
195 // std::cout << "maximum matching: "<< std::endl;
196 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
198 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
199 // std::cout<<std::endl;
200 // std::cout << "edges which are not in this maximum matching: "<< std::endl;
201 // for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e))
203 // std::cout << G.id(G.tail(e)) << "-" << flow.get(e) << "->" << G.id(G.head(e)) << " ";
204 // std::cout<<std::endl;
207 std::cout << "elapsed time: " << ts << std::endl;
208 //std::cout << "number of augmentation phases: " << i << std::endl;
209 std::cout << "flow value: "<< l.size() << std::endl;