#include <iostream>

 #include <fstream>

 #include <list_graph.hh>

 #include <dimacs.hh>

 #include <preflow_hl4.h>

 #include <time_measure.h>

 using namespace hugo;

 //Note, that preflow_hl4.h has a member NodeMap<bool> cut, 

 //the construction of which slowing the running time by 1-10%.

 // 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_hl4 demo ..." << std::endl;

   double mintime=1000000;

   for ( int i=1; i!=11; ++i ) {

     double pre_time=currTime();

     preflow_hl4<ListGraph, int> max_flow_test(G, s, t, cap);

     double post_time=currTime();

     if ( mintime > post_time-pre_time ) mintime = post_time-pre_time;

   }

   double pre_time=currTime();

   preflow_hl4<ListGraph, int> max_flow_test(G, s, t, cap);

   double post_time=currTime();

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

   max_flow_test.minCut(cut); 

   int min_cut_value=0;

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

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

   }

   ListGraph::NodeMap<bool> cut1(G);

   max_flow_test.minMinCut(cut1); 

   int min_min_cut_value=0;

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

     if (cut.get(G.tail(e)) && !cut.get(G.head(e))) 

       min_min_cut_value+=cap.get(e);

   }

   ListGraph::NodeMap<bool> cut2(G);

   max_flow_test.maxMinCut(cut2); 

   int max_min_cut_value=0;

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

     if (cut2.get(G.tail(e)) && !cut2.get(G.head(e))) 

       max_min_cut_value+=cap.get(e);

   }

   std::cout << "min time of 10 runs: " << mintime << " sec"<< std::endl; 

   std::cout << "phase 0: " << max_flow_test.time-pre_time 

 	    << " sec"<< std::endl; 

   std::cout << "phase 1: " << post_time-max_flow_test.time 

 	    << " sec"<< std::endl; 

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

   std::cout << "min cut value: "<< min_cut_value << std::endl;

   std::cout << "min min cut value: "<< min_min_cut_value << std::endl;

   std::cout << "max min cut value: "<< max_min_cut_value << 

     std::endl<< std::endl;

   return 0;

 }