#include <sys/time.h>

 #include <iostream>

 #include <fstream>

 #include <list_graph.hh>

 #include <dimacs.hh>

 #include <edmonds_karp.hh>

 using namespace marci;

 double currTime() {

   timeval tv;

   //timezone tz;

   gettimeofday(&tv, 0);

   return double(tv.tv_sec)+double(tv.tv_usec)/1000000.0;

 }

 // Use a DIMACS max flow file as stdin.

 // read_dimacs_demo < dimacs_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 << "augmenting path flow algorithm demo..." << std::endl;

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

   double preTime=currTime();

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

   max_flow_test.run();

   double pushTime=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: " << pushTime-preTime << " sec"<< std::endl; 

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

   return 0;

 }