#include <iostream>

#include <fstream>

#include <list_graph.h>

#include <dimacs.h>

#include <preflow_push.hh>

#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::Node Node;

  //typedef ListGraph::EachEdgeIt EachEdgeIt;

  ListGraph G;

  Node s, t;

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

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

  std::cout << "preflow demo (ATHOS)..." << std::endl;

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

  double pre_time=currTime();

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

  int flow_value=max_flow_test.run();

  //ListGraph::NodeMap<bool> cut=max_flow_test.mincut();

  //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: "<< flow_value << std::endl;

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

  return 0;

}