// -*- c++ -*-

 #include <iostream>

 #include <fstream>

 #include <vector>

 #include <cstdlib>

 #include <sage_graph.h>

 //#include <smart_graph.h>

 //#include <dimacs.h>

 #include <hugo/time_measure.h>

 #include <hugo/for_each_macros.h>

 #include <bfs_dfs.h>

 #include <hugo/graph_wrapper.h>

 #include <bipartite_graph_wrapper.h>

 #include <hugo/maps.h>

 #include <max_flow.h>

 /**

  * Inicializalja a veletlenszamgeneratort.

  * Figyelem, ez nem jo igazi random szamokhoz,

  * erre ne bizzad a titkaidat!

  */

 void random_init()

 {

 	unsigned int seed = getpid();

 	seed |= seed << 15;

 	seed ^= time(0);

 	srand(seed);

 }

 /**

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

  */

 int random(int m)

 {

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

 }

 using namespace hugo;

 int main() {

   typedef UndirSageGraph Graph; 

   typedef Graph::Node Node;

   typedef Graph::NodeIt NodeIt;

   typedef Graph::Edge Edge;

   typedef Graph::EdgeIt EdgeIt;

   typedef Graph::OutEdgeIt OutEdgeIt;

   Graph g;

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

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

   int a;

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

   std::cin >> a; 

   int b;

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

   std::cin >> b; 

   int m;

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

   std::cin >> m; 

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

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

   random_init();

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

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

   }

   Graph::NodeMap<int> ref_map(g, -1);

   IterableBoolMap< Graph::NodeMap<int> > bipartite_map(ref_map);

   for (int i=0; i<a; ++i) bipartite_map.insert(s_nodes[i], false);

   for (int i=0; i<b; ++i) bipartite_map.insert(t_nodes[i], true);

 //   Graph::Node u;

 //   std::cout << "These nodes will be in S:\n";

 //   //FIXME azert kellene ++, es invalid vizsgalat u-bol, hogy ezt le lehessen 

 //   //irni 1etlen FOR_EACH-csel.

 //   for (bipartite_map.first(u, false); g.valid(u); bipartite_map.next(u)) 

 //     std::cout << u << " ";

 //   std::cout << "\n";

 //   std::cout << "These nodes will be in T:\n";

 //   for (bipartite_map.first(u, true); g.valid(u); bipartite_map.next(u)) 

 //     std::cout << u << " ";

 //   std::cout << "\n";

   typedef BipartiteGraphWrapper<Graph> BGW;

   BGW bgw(g, bipartite_map);

 //   std::cout << "Nodes by NodeIt:\n";

 //   FOR_EACH_LOC(BGW::NodeIt, n, bgw) {

 //     std::cout << n << " ";

 //   }

 //   std::cout << "\n";

 //   std::cout << "Nodes in S by ClassNodeIt:\n";

 //   FOR_EACH_INC_LOC(BGW::ClassNodeIt, n, bgw, bgw.S_CLASS) {

 //     std::cout << n << " ";

 //   }

 //   std::cout << "\n";

 //   std::cout << "Nodes in T by ClassNodeIt:\n";

 //   FOR_EACH_INC_LOC(BGW::ClassNodeIt, n, bgw, bgw.T_CLASS) {

 //     std::cout << n << " ";

 //   }

 //   std::cout << "\n";

 //   std::cout << "Edges of the bipartite graph:\n";

 //   FOR_EACH_LOC(BGW::EdgeIt, e, bgw) {

 //     std::cout << bgw.tail(e) << "->" << bgw.head(e) << std::endl;

 //   }

 //  BGW::NodeMap<int> dbyj(bgw);

 //  BGW::EdgeMap<int> dbyxcj(bgw);

   typedef stGraphWrapper<BGW> stGW;

   stGW stgw(bgw);

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

 //  stGW::NodeMap<int> ize(stgw);

 //   BfsIterator< BGW, BGW::NodeMap<bool> > bfs(bgw);

 //   Graph::NodeIt si;

 //   Graph::Node s; 

 //   s=g.first(si);

 //   bfs.pushAndSetReached(BGW::Node(s));

 //   while (!bfs.finished()) { ++bfs; }

 //   FOR_EACH_LOC(stGW::NodeIt, n, stgw) { 

 //     std::cout << "out-edges of " << n << ":\n"; 

 //     FOR_EACH_INC_LOC(stGW::OutEdgeIt, e, stgw, n) { 

 //       std::cout << " " << e << "\n";

 //       std::cout << " aNode: " << stgw.aNode(e) << "\n";

 //       std::cout << " bNode: " << stgw.bNode(e) << "\n";      

 //     }

 //     std::cout << "in-edges of " << n << ":\n"; 

 //     FOR_EACH_INC_LOC(stGW::InEdgeIt, e, stgw, n) { 

 //       std::cout << " " << e << "\n";

 //       std::cout << " aNode: " << stgw.aNode(e) << "\n";

 //       std::cout << " bNode: " << stgw.bNode(e) << "\n";     

 //     }

 //   }

 //   std::cout << "Edges of the stGraphWrapper:\n"; 

 //   FOR_EACH_LOC(stGW::EdgeIt, n, stgw) { 

 //     std::cout << " " << n << "\n";

 //   }

 //   stGW::NodeMap<bool> b(stgw);

 //   FOR_EACH_LOC(stGW::NodeIt, n, stgw) { 

 //     std::cout << n << ": " << b[n] <<"\n";

 //   }

 //   std::cout << "Bfs from s: \n";

 //   BfsIterator< stGW, stGW::NodeMap<bool> > bfs_stgw(stgw);

 //   bfs_stgw.pushAndSetReached(stgw.S_NODE);

 //   while (!bfs_stgw.finished()) { 

 //     std::cout << " " << stGW::OutEdgeIt(bfs_stgw) << "\n";

 //     ++bfs_stgw; 

 //   }

   Timer ts;

   ts.reset();

   stGW::EdgeMap<int> max_flow(stgw);

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

     max_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, max_flow);

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

   typedef SageGraph MutableGraph;

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

   while (max_flow_test.augmentOnBlockingFlow2()) {

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

   }

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

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

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

 //     std::cout << e << ": " << max_flow[e] << "\n"; 

 //   }

 //   std::cout << "\n";

   ts.reset();

   stGW::EdgeMap<int> pre_flow(stgw);

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

     pre_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, pre_flow/*, true*/);

   pre_flow_test.run();

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

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

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

 //     std::cout << e << ": " << pre_flow[e] << "\n"; 

 //   }

 //   std::cout << "\n";

   return 0;

 }