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grocery.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, 2001
00008  *
00009  *  Last modified:
00010  *     $Date: 2009-09-30 12:12:35 +0200 (Wed, 30 Sep 2009) $ by $Author: tack $
00011  *     $Revision: 9779 $
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 #include <gecode/minimodel.hh>
00041 
00042 using namespace Gecode;
00043 
00060 class Grocery : public Script {
00061 protected:
00063   IntVarArray abcd;
00065   static const int s = 711;
00067   static const int p = 711 * 100 * 100 * 100;
00068 public:
00070   Grocery(const Options& opt) : abcd(*this,4,0,s) {
00071     IntVar a(abcd[0]), b(abcd[1]), c(abcd[2]), d(abcd[3]);
00072     // The sum of all variables is s
00073     post(*this, a+b+c+d == s, opt.icl());
00074 
00075     // The product of all variables is s (corrected by scale factor)
00076     rel(*this,
00077         mult(*this,
00078              mult(*this, a, b, opt.icl()),
00079              mult(*this, c, d, opt.icl()),
00080              opt.icl()),
00081         IRT_EQ, p);
00082 
00083     // Break symmetries: order the variables
00084     rel(*this, a, IRT_LQ, b);
00085     rel(*this, b, IRT_LQ, c);
00086     rel(*this, c, IRT_LQ, d);
00087 
00088     branch(*this, abcd, INT_VAR_NONE, INT_VAL_SPLIT_MAX);
00089   }
00090 
00092   Grocery(bool share, Grocery& s) : Script(share,s) {
00093     abcd.update(*this, share, s.abcd);
00094   }
00095 
00097   virtual Space*
00098   copy(bool share) {
00099     return new Grocery(share,*this);
00100   }
00101 
00103   virtual void
00104   print(std::ostream& os) const {
00105     os << "\t" << abcd << std::endl;
00106   }
00107 };
00108 
00112 int
00113 main(int argc, char* argv[]) {
00114   Options opt("Grocery");
00115   opt.iterations(20);
00116   opt.parse(argc,argv);
00117   Script::run<Grocery,DFS,Options>(opt);
00118   return 0;
00119 }
00120 
00121 // STATISTICS: example-any
00122