#include <iostream>

 #include <fstream>

 #include <smart_graph.h>

 #include <list_graph.h>

 #include <dimacs.h>

 #include <preflow.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 SmartGraph::Node Node;

   typedef SmartGraph::EdgeIt EdgeIt;

   SmartGraph G;

   Node s, t;

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

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

   std::cout << "preflow demo ..." << std::endl;

   double mintime=1000000;

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

     SmartGraph::EdgeMap<int> flow(G);

     double pre_time=currTime();

     Preflow<SmartGraph, int> max_flow_test(G, s, t, cap, flow);

     max_flow_test.run();

     double post_time=currTime();

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

   }

   SmartGraph::EdgeMap<int> flow(G);

   Preflow<SmartGraph, int> max_flow_test(G, s, t, cap, flow);

   max_flow_test.run();

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

   max_flow_test.minCut(cut); 

   int min_cut_value=0;

   EdgeIt e;

   for(G.first(e); G.valid(e); G.next(e)) {

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

   }

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

   max_flow_test.minMinCut(cut1); 

   int min_min_cut_value=0;

   for(G.first(e); G.valid(e); G.next(e)) {

     if (cut[G.tail(e)] && !cut[G.head(e)]) 

       min_min_cut_value+=cap[e];

   }

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

   max_flow_test.maxMinCut(cut2); 

   int max_min_cut_value=0;

   for(G.first(e); G.valid(e); G.next(e)) {

     if (cut2[G.tail(e)] && !cut2[G.head(e)]) 

       max_min_cut_value+=cap[e];

       }

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

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

 }