#include <iostream>

 #include <fstream>

 #include <list_graph.hh>

 #include <dimacs.hh>

 #include <preflow_push_max_flow.h>

 #include <preflow_push_hl.h>

 #include <time_measure.h>

 using namespace hugo;

 // Use a DIMACS max flow file as stdin.

 // read_dimacs_demo < dimacs_max_flow_file

 int main(int, char **) {

   typedef ListGraph::NodeIt NodeIt;

   typedef ListGraph::EachEdgeIt EachEdgeIt;

   ListGraph G;

   NodeIt s, t;

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

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

   {

   std::cout << "preflow demo (preflow_push_max_flow by JACINT)..." << std::endl;

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

   double pre_time=currTime();

   preflow_push_max_flow<ListGraph, int> max_flow_test(G, s, t, cap);

   max_flow_test.run();

   ListGraph::NodeMap<bool> cut(G); 

   max_flow_test.mincut(cut);

   int cut_value=0;

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

     if (cut.get(G.tail(e)) && !cut.get(G.head(e))) cut_value+=cap.get(e);

   }

   double post_time=currTime();

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

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

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

   //}

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

   std::cout << "elapsed time: " << post_time-pre_time << " sec"<< std::endl; 

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

   std::cout << "cut value: "<< cut_value << std::endl;

   }

     {

   std::cout << "preflow demo (preflow_push_hl by JACINT)..." << std::endl;

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

   double pre_time=currTime();

   preflow_push_hl<ListGraph, int> max_flow_test(G, s, t, cap);

   max_flow_test.run();

   ListGraph::NodeMap<bool> cut(G);

   max_flow_test.mincut(cut);

   int cut_value=0;

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

     if (cut.get(G.tail(e)) && !cut.get(G.head(e))) cut_value+=cap.get(e);

   }

   double post_time=currTime();

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

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

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

   //}

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

   std::cout << "elapsed time: " << post_time-pre_time << " sec"<< std::endl; 

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

   std::cout << "cut value: "<< cut_value << std::endl;

   }

   return 0;

 }