// -*- c++ -*-

 #include <iostream>

 #include <fstream>

 #include <LEDA/graph.h>

 #include <leda_graph_wrapper.h>

 #include <dimacs.h>

 #include <time_measure.h>

 #include <edmonds_karp.h>

 using namespace hugo;

 using std::cout; 

 using std::endl;

 int main() {

   leda::graph g;

   typedef LedaGraphWrapper<leda::graph> Graph;

   Graph G(g);

 //   G.addNode();

 //   G.addNode();

 //   std::cout << G.nodeNum() << std::endl; 

   typedef Graph::Node Node;

   typedef Graph::NodeIt NodeIt;  

   typedef Graph::Edge Edge;

   typedef Graph::EdgeIt EdgeIt;

   typedef Graph::OutEdgeIt OutEdgeIt;

   typedef Graph::InEdgeIt InEdgeIt;

   Node s, t;

   Graph::EdgeMap<int> cap(G);

   readDimacsMaxFlow(std::cin, G, s, t, cap);

 //   cout << "bfs and dfs iterator demo on the directed graph" << endl;

 //   for(NodeIt n=G.first<NodeIt>(); G.valid(n); G.next(n)) { 

 //     cout << G.id(n) << ": ";

 //     cout << "out edges: ";

 //     for(OutEdgeIt e=G.first<OutEdgeIt>(n); G.valid(e); G.next(e)) 

 //       cout << G.id(G.tail(e)) << "-" << cap.get(e) << "->" << G.id(G.head(e)) << " ";

 //     cout << "in edges: ";

 //     for(InEdgeIt e=G.first<InEdgeIt>(n); G.valid(e); G.next(e)) 

 //       cout << G.id(G.tail(e)) << "-" << cap.get(e) << "->" << G.id(G.head(e)) << " ";

 //     cout << endl;

 //   }

 //   int i=0;

 //   for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e)) { cap.set(e, i); i+=3; }

 //   for(EdgeIt e=G.first<EdgeIt>(); G.valid(e); G.next(e)) { cout << cap.get(e) << " "; }

 //   cout << endl;

   {

     //std::cout << "SmartGraph..." << std::endl;

     std::cout << "on-the-fly edmonds karp demo on wrapped leda graph..." << std::endl;

     Graph::EdgeMap<int> flow(G); //0 flow

     Timer ts;

     ts.reset();

     MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > max_flow_test(G, s, t, flow, cap);

     //max_flow_test.augmentWithBlockingFlow<Graph>();

     int i=0;

     while (max_flow_test.augmentOnShortestPath()) { 

 //     for(EdgeIt e=G.template first<EdgeIt>(); e.valid(); ++e) { 

 //       std::cout<<"("<<G.tail(e)<< "-"<<flow.get(e)<<"->"<<G.head(e)<<") ";

 //     }

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

       ++i; 

     }

 //   std::cout << "maximum flow: "<< std::endl;

 //   for(EdgeIt e=G.first<EdgeIt>(); e.valid(); ++e) { 

 //     std::cout<<"("<<G.tail(e)<< "-"<<flow.get(e)<<"->"<<G.head(e)<<") ";

 //   }

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

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

     std::cout << "number of augmentation phases: " << i << std::endl; 

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

   }

   return 0;

 }