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stress-min.cpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2004
00008  *
00009  *  Last modified:
00010  *     $Date: 2009-05-14 00:24:31 +0200 (Thu, 14 May 2009) $ by $Author: tack $
00011  *     $Revision: 9095 $
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  *  Permission is hereby granted, free of charge, to any person obtaining
00018  *  a copy of this software and associated documentation files (the
00019  *  "Software"), to deal in the Software without restriction, including
00020  *  without limitation the rights to use, copy, modify, merge, publish,
00021  *  distribute, sublicense, and/or sell copies of the Software, and to
00022  *  permit persons to whom the Software is furnished to do so, subject to
00023  *  the following conditions:
00024  *
00025  *  The above copyright notice and this permission notice shall be
00026  *  included in all copies or substantial portions of the Software.
00027  *
00028  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00031  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00032  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00033  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00034  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00035  *
00036  */
00037 
00038 #include <gecode/driver.hh>
00039 #include <gecode/int.hh>
00040 
00041 using namespace Gecode;
00042 
00049 class StressMin : public Script {
00050 protected:
00052   const int n;
00054   IntVarArray x;
00055 public:
00057   StressMin(const SizeOptions& opt)
00058     : n(opt.size()), x(*this,n,0,2*n-1) {
00059     for (int i=1; i<n; i++) {
00060       IntVarArgs y(i);
00061       for (int j=0; j<i; j++)
00062         y[j]=x[j];
00063       IntVar m(*this,0,2*n);
00064       min(*this, y, m);
00065       rel(*this, m, IRT_GR, x[i]);
00066     }
00067     branch(*this, x, INT_VAR_NONE, INT_VAL_SPLIT_MAX);
00068   }
00069 
00071   StressMin(bool share, StressMin& s) : Script(share,s), n(s.n) {
00072     x.update(*this, share, s.x);
00073   }
00074 
00076   virtual Space*
00077   copy(bool share) {
00078     return new StressMin(share,*this);
00079   }
00080 
00082   virtual void
00083   print(std::ostream& os) const {
00084     os << "\tx[" << n << "] = " << x << std::endl;
00085   }
00086 };
00087 
00088 
00092 int
00093 main(int argc, char* argv[]) {
00094   SizeOptions opt("StressMin");
00095   opt.parse(argc,argv);
00096   opt.size(200);
00097   Script::run<StressMin,DFS,SizeOptions>(opt);
00098   return 0;
00099 }
00100 
00101 // STATISTICS: example-any