stress-min.cc

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2004
 *
 *  Last modified:
 *     $Date: 2007-11-30 13:58:34 +0100 (Fri, 30 Nov 2007) $ by $Author: tack $
 *     $Revision: 5524 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
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 *  permit persons to whom the Software is furnished to do so, subject to
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#include "examples/support.hh"

class StressMin : public Example {
protected:
  const int n;
  IntVarArray x;
public:
  StressMin(const SizeOptions& opt)
    : n(opt.size()), x(this,n,0,2*n-1) {
    for (int i=1; i<n; i++) {
      IntVarArgs y(i);
      for (int j=0; j<i; j++)
        y[j]=x[j];
      IntVar m(this,0,2*n);
      min(this, y, m);
      rel(this, m, IRT_GR, x[i]);
    }
    branch(this, x, INT_VAR_NONE, INT_VAL_SPLIT_MAX);
  }

  StressMin(bool share, StressMin& s) : Example(share,s), n(s.n) {
    x.update(this, share, s.x);
  }

  virtual Space*
  copy(bool share) {
    return new StressMin(share,*this);
  }

  virtual void
  print(std::ostream& os) {
    os << "\tx[" << n << "] = " << x << std::endl;
  }
};


int
main(int argc, char* argv[]) {
  SizeOptions opt("StressMin");
  opt.parse(argc,argv);
  opt.size(200);
  Example::run<StressMin,DFS,SizeOptions>(opt);
  return 0;
}

// STATISTICS: example-any