source: lemon-0.x/benchmark/hcube.cc @ 2139:582c8c28aa01

/* -*- C++ -*-
 *
 * This file is a part of LEMON, a generic C++ optimization library
 *
 * Copyright (C) 2003-2006
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 * Permission to use, modify and distribute this software is granted
 * provided that this copyright notice appears in all copies. For
 * precise terms see the accompanying LICENSE file.
 *
 * This software is provided "AS IS" with no warranty of any kind,
 * express or implied, and with no claim as to its suitability for any
 * purpose.
 *
 */

#include<cmath>
#include<lemon/list_graph.h>
#include<lemon/smart_graph.h>
#include<lemon/dijkstra.h>
#include<lemon/preflow.h>

#include"bench_tools.h"

using namespace std;
using namespace lemon;

inline int numOfOnes(int n,int dim)
{
  int s=0;
  for(int i=0;i<dim;i++) {
    s+=n%2;
    n>>=1;
  }
  return s;
}

inline int numOfZeros(int n,int dim)
{
  int s=dim;
  for(int i=0;i<dim;i++) {
    s-=n&1;
    n>>=1;
  }
  return s;
}

int main(int argc, char *argv[])
{
  //  typedef ListGraph Graph;
  typedef SmartGraph Graph;

  GRAPH_TYPEDEFS(Graph);

  Graph G;
  
  Timer T;
  
  if(argc!=2) {
    cout << "Usage: " << argv[0] << " dim\n";
    return 1;
  }
  
  int dim=atoi(argv[1]);
  
//   cout << "Creating Hipercube ("<< (1<<dim) << " nodes, "
//        << dim*(1<<dim) << " edges):";

  T.restart();
  vector<Node> nodes;
  addBiDirHyperCube(G,dim,nodes);

  PrintTime("GENGRAPH",T);

  T.restart();
  Graph::EdgeMap<int> map(G);
  for(int i=0;i<5;i++) {
    Primes P;
    for(int i=0;i<dim*(1<<dim);i++) P();
    
    //  for(EdgeIt e(G);G.valid(e);G.next(e)) map[e]=P();

    ///\todo It must have been commented out because of
    ///setToId
//     Edge te;
//     for(int i=0;i<dim*(1<<dim);i++) {
//       te.setToId(((long long int)(i)*93505)%(dim*(1<<dim)));
//       //    map[Edge(((long long int)(i)*2987)%(dim*(1<<dim)))]=P();
//       map[te]=P();
//     }
    
//     for(int i=0;i<(1<<dim);i++) {
//       int mul= (1<<(numOfZeros(i,dim)/4));
//       for(OutEdgeIt e(G,nodes[i]);G.valid(e);G.next(e))
//      map[e]*=mul;
//     }
  }
  
  PrintTime("GENLENGTHS",T);

  T.restart();
  {
    Dijkstra<Graph> Dij(G,map);
    for(int i=0;i<10;i++)
      Dij.run(nodes[0]);
  }
  PrintTime("DIJKSTRA",T);

  T.restart();
  {
   Graph::EdgeMap<int> flow(G);
   
    Preflow<Graph,int> MF(G,nodes[0],nodes[1<<dim-1],map,flow);
    for(int i=0;i<10;i++)
      MF.run(MF.NO_FLOW);
  }
  PrintTime("PREFLOW",T);

}