lemon-0.x: src/work/marci/bipartite_matching_try

     1 // -*- c++ -*-

     2 #include <iostream>

     3 #include <fstream>

     4 #include <vector>

     5 #include <cstdlib>

     7 #include <list_graph.h>

     8 //#include <smart_graph.h>

     9 //#include <dimacs.h>

    10 #include <time_measure.h>

    11 #include <for_each_macros.h>

    12 #include <bfs_iterator.h>

    13 #include <bipartite_graph_wrapper.h>

    14 #include <maps.h>

    15 #include <max_flow.h>

    17 using namespace hugo;

    19 // template <typename Graph, typename EdgeCap, typename NodeCap,

    20 // 	  typename EdgeFlow, typename NodeFlow>

    21 // class MaxMatching : public MaxFlow<stGraphWrapper<Graph>,

    22 // 				   stGraphWrapper<Graph>:: EdgeMapWrapper<EdgeCan, NodeCap>, stGraphWrapper<Graph>::EdgeMapWrapper<EdgeFlow, NodeFlow> > {

    23 //   typedef MaxFlow<stGraphWrapper<Graph>,

    24 // 		  stGraphWrapper<Graph>::EdgeMapWrapper<EdgeCan, NodeCap>,

    25 // 		  stGraphWrapper<Graph>::EdgeMapWrapper<EdgeFlow, NodeFlow> >

    26 //   Parent;

    27 // protected:

    28 //   stGraphWrapper<Graph> gw;

    29 //   stGraphWrapper<Graph>::EdgeMapWrapper<EdgeCap, NodeCap> cap;

    30 //   stGraphWrapper<Graph>::EdgeMapWrapper<EdgeFlow, NodeFlow> flow;

    31 //   //graph* g;

    32 //   //EdgeCap* edge_cap;

    33 //   //EdgeFlow* edge_flow;

    34 // public:

    35 //   MaxMatching(Graph& _g, EdgeCap& _edge_cap, NodeCap& _node_cap,

    36 // 	      EdgeFlow& _edge_flow, NodeFlow& _node_flow) :

    37 //     MaxFlow(), gw(_g),

    38 //     cap(_edge_cap, _node_cap), flow(_edge_flow, _node_flow) {

    39 //     Parent::set(gw, cap, flow);

    40 //   }

    41 // };

    43 template <typename Graph, typename EdgeCap, typename NodeCap,

    44 	  typename EdgeFlow, typename NodeFlow>

    45 class MaxMatching {

    46 protected:

    47 //   EdgeCap* edge_cap;

    48 //   NodeCap* node_cap;

    49 //   EdgeFlow* edge_flow;

    50 //   NodeFlow* node_flow;

    51   typedef  stGraphWrapper<Graph> stGW;

    52   stGW stgw;

    53   typedef typename stGW::template EdgeMapWrapper<EdgeCap, NodeCap> CapMap;

    54   CapMap cap;

    55   NodeFlow* node_flow;

    56   typedef typename stGW::template EdgeMapWrapper<EdgeFlow, NodeFlow> FlowMap;

    57   FlowMap flow;

    58   MaxFlow<stGW, int, CapMap, FlowMap> mf;

    59   //graph* g;

    60   //EdgeCap* edge_cap;

    61   //EdgeFlow* edge_flow;

    62 public:

    63   MaxMatching(Graph& _g, EdgeCap& _edge_cap, NodeCap& _node_cap,

    64 	      EdgeFlow& _edge_flow, NodeFlow& _node_flow) :

    65     stgw(_g),

    66     cap(_edge_cap, _node_cap),

    67     node_flow(0),

    68     flow(_edge_flow, _node_flow),

    69     mf(stgw, stgw.S_NODE, stgw.T_NODE, cap, flow) { }

    70   MaxMatching(Graph& _g, EdgeCap& _edge_cap, NodeCap& _node_cap,

    71 	      EdgeFlow& _edge_flow/*, NodeFlow& _node_flow*/) :

    72     stgw(_g),

    73     cap(_edge_cap, _node_cap),

    74     node_flow(new NodeFlow(_g)),

    75     flow(_edge_flow, *node_flow),

    76     mf(stgw, stgw.S_NODE, stgw.T_NODE, cap, flow) { }

    77   ~MaxMatching() { if (node_flow) delete node_flow; }

    78   void run() { mf.run(); }

    79   int matchingValue() { return mf.flowValue(); }

    80 };

    82 /**

    83  * Inicializalja a veletlenszamgeneratort.

    84  * Figyelem, ez nem jo igazi random szamokhoz,

    85  * erre ne bizzad a titkaidat!

    86  */

    87 void random_init()

    88 {

    89 	unsigned int seed = getpid();

    90 	seed |= seed << 15;

    91 	seed ^= time(0);

    93 	srand(seed);

    94 }

    96 /**

    97  * Egy veletlen int-et ad vissza 0 es m-1 kozott.

    98  */

    99 int random(int m)

   100 {

   101   return int( double(m) * rand() / (RAND_MAX + 1.0) );

   102 }

   104 int main() {

   105   //typedef UndirListGraph Graph;

   106   typedef BipartiteGraph<ListGraph> Graph;

   108   typedef Graph::Node Node;

   109   typedef Graph::NodeIt NodeIt;

   110   typedef Graph::Edge Edge;

   111   typedef Graph::EdgeIt EdgeIt;

   112   typedef Graph::OutEdgeIt OutEdgeIt;

   114   Graph g;

   116   std::vector<Graph::Node> s_nodes;

   117   std::vector<Graph::Node> t_nodes;

   119   int a;

   120   std::cout << "number of nodes in the first color class=";

   121   std::cin >> a;

   122   int b;

   123   std::cout << "number of nodes in the second color class=";

   124   std::cin >> b;

   125   int m;

   126   std::cout << "number of edges=";

   127   std::cin >> m;

   129   std::cout << "Generatig a random bipartite graph..." << std::endl;

   130   for (int i=0; i<a; ++i) s_nodes.push_back(g.addNode(false));

   131   for (int i=0; i<b; ++i) t_nodes.push_back(g.addNode(true));

   133   random_init();

   134   for(int i=0; i<m; ++i) {

   135     g.addEdge(s_nodes[random(a)], t_nodes[random(b)]);

   136   }

   138 //   std::cout << "Edges of the bipartite graph:" << std::endl;

   139 //   FOR_EACH_LOC(EdgeIt, e, g) std::cout << e << " ";

   140 //   std::cout << std::endl;

   142 //   std::cout << "Nodes:" << std::endl;

   143 //   FOR_EACH_LOC(Graph::NodeIt, v, g) std::cout << v << " ";

   144 //   std::cout << std::endl;

   145 //   std::cout << "Nodes in T:" << std::endl;

   146 //   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::T_CLASS) std::cout << v << " ";

   147 //   std::cout << std::endl;

   148 //   std::cout << "Nodes in S:" << std::endl;

   149 //   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::S_CLASS) std::cout << v << " ";

   150 //   std::cout << std::endl;

   152 //   std::cout << "Erasing the first node..." << std::endl;

   153 //   NodeIt n;

   154 //   g.first(n);

   155 //   g.erase(n);

   156 //   std::cout << "Nodes of the bipartite graph:" << std::endl;

   157 //   FOR_EACH_GLOB(n, g) std::cout << n << " ";

   158 //   std::cout << std::endl;

   160 //   std::cout << "Nodes in T:" << std::endl;

   161 //   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::T_CLASS) std::cout << v << " ";

   162 //   std::cout << std::endl;

   163 //   std::cout << "Nodes in S:" << std::endl;

   164 //   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::S_CLASS) std::cout << v << " ";

   165 //   std::cout << std::endl;

   167   typedef stGraphWrapper<Graph> stGW;

   168   stGW stgw(g);

   169   ConstMap<stGW::Edge, int> const1map(1);

   171   Timer ts;

   172   ts.reset();

   173   stGW::EdgeMap<int> flow(stgw);

   174   MaxFlow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> >

   175     max_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, flow);

   176   max_flow_test.run();

   177 //  while (max_flow_test.augmentOnShortestPath()) { }

   178 //  typedef ListGraph MutableGraph;

   179 //  while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) {

   180 //  while (max_flow_test.augmentOnBlockingFlow2()) {

   181 //   std::cout << max_flow_test.flowValue() << std::endl;

   182 //  }

   183   std::cout << "max flow value: " << max_flow_test.flowValue() << std::endl;

   184   std::cout << "elapsed time: " << ts << std::endl;

   185 //   FOR_EACH_LOC(stGW::EdgeIt, e, stgw) {

   186 //     if (flow[e]) std::cout << e << std::endl;

   187 //   }

   188   std::cout << std::endl;

   190   typedef ConstMap<Graph::Edge, int> EdgeCap;

   191   EdgeCap ge1(1);

   192   typedef ConstMap<Graph::Node, int> NodeCap;

   193   NodeCap gn1(1);

   194   typedef Graph::EdgeMap<int> EdgeFlow;

   195   EdgeFlow gef(g); //0

   196   typedef Graph::NodeMap<int> NodeFlow;

   197   NodeFlow gnf(g); //0

   199   typedef stGraphWrapper<Graph>::EdgeMapWrapper<EdgeCap, NodeCap> CapMap;

   200   typedef stGraphWrapper<Graph>::EdgeMapWrapper<EdgeFlow, NodeFlow> FlowMap;

   201   CapMap cm(ge1, gn1);

   202   FlowMap fm(gef, gnf);

   204   //Timer ts;

   205   ts.reset();

   206   //stGW::EdgeMap<int> flow(stgw);

   207   MaxFlow<stGW, int, CapMap, FlowMap>

   208     max_flow_test1(stgw, stgw.S_NODE, stgw.T_NODE, cm, fm);

   209   max_flow_test1.run();

   210 //  while (max_flow_test.augmentOnShortestPath()) { }

   211 //  typedef ListGraph MutableGraph;

   212 //  while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) {

   213 //  while (max_flow_test.augmentOnBlockingFlow2()) {

   214 //   std::cout << max_flow_test.flowValue() << std::endl;

   215 //  }

   216   std::cout << "max flow value: " << max_flow_test1.flowValue() << std::endl;

   217   std::cout << "elapsed time: " << ts << std::endl;

   218 //   FOR_EACH_LOC(Graph::EdgeIt, e, g) {

   219 //     if (gef[e]) std::cout << e << std::endl;

   220 //   }

   221   std::cout << std::endl;

   223   ts.reset();

   224   FOR_EACH_LOC(Graph::EdgeIt, e, g) gef.set(e, 0);

   225   FOR_EACH_LOC(Graph::NodeIt, n, g) gnf.set(n, 0);

   226   MaxMatching<Graph, ConstMap<Graph::Edge, int>, ConstMap<Graph::Node, int>,

   227     Graph::EdgeMap<int>, Graph::NodeMap<int> >

   228     matching_test(g, ge1, gn1, gef, gnf);

   229   matching_test.run();

   231   std::cout << "max flow value: " << matching_test.matchingValue() << std::endl;

   232   std::cout << "elapsed time: " << ts << std::endl;

   233 //   FOR_EACH_LOC(Graph::EdgeIt, e, g) {

   234 //     if (gef[e]) std::cout << e << std::endl;

   235 //   }

   236   std::cout << std::endl;

   238   ts.reset();

   239   FOR_EACH_LOC(Graph::EdgeIt, e, g) gef.set(e, 0);

   240   //FOR_EACH_LOC(Graph::NodeIt, n, g) gnf.set(n, 0);

   241   MaxMatching<Graph, ConstMap<Graph::Edge, int>, ConstMap<Graph::Node, int>,

   242     Graph::EdgeMap<int>, Graph::NodeMap<int> >

   243     matching_test_1(g, ge1, gn1, gef/*, gnf*/);

   244   matching_test_1.run();

   246   std::cout << "max flow value: " << matching_test_1.matchingValue() << std::endl;

   247   std::cout << "elapsed time: " << ts << std::endl;

   248 //   FOR_EACH_LOC(Graph::EdgeIt, e, g) {

   249 //     if (gef[e]) std::cout << e << std::endl;

   250 //   }

   251   std::cout << std::endl;

   253   return 0;

   254 }

author	jacint
	Wed, 05 May 2004 17:23:04 +0000
changeset 534	22ce98f7d0f1
parent 510	72143568cadc
child 555	995bc1f1a3ce
permissions	-rw-r--r--