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grocery.cpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2001
8  *
9  * Last modified:
10  * $Date: 2010-10-07 20:52:01 +1100 (Thu, 07 Oct 2010) $ by $Author: schulte $
11  * $Revision: 11473 $
12  *
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37 
38 #include <gecode/driver.hh>
39 #include <gecode/int.hh>
40 #include <gecode/minimodel.hh>
41 
42 using namespace Gecode;
43 
60 class Grocery : public Script {
61 protected:
65  static const int s = 711;
67  static const int p = 711 * 100 * 100 * 100;
68 public:
70  Grocery(const Options& opt) : abcd(*this,4,0,s) {
71  IntVar a(abcd[0]), b(abcd[1]), c(abcd[2]), d(abcd[3]);
72 
73  // The sum of all variables is s
74  rel(*this, a+b+c+d == s, opt.icl());
75 
76  // The product of all variables is s (corrected by scale factor)
77  rel(*this, (a*b)*(c*d) == p, opt.icl());
78 
79  // Break symmetries: order the variables
80  rel(*this, abcd, IRT_LQ);
81 
82  branch(*this, abcd, INT_VAR_NONE, INT_VAL_SPLIT_MAX);
83  }
84 
86  Grocery(bool share, Grocery& s) : Script(share,s) {
87  abcd.update(*this, share, s.abcd);
88  }
89 
91  virtual Space*
92  copy(bool share) {
93  return new Grocery(share,*this);
94  }
95 
97  virtual void
98  print(std::ostream& os) const {
99  os << "\t" << abcd << std::endl;
100  }
101 };
102 
106 int
107 main(int argc, char* argv[]) {
108  Options opt("Grocery");
109  opt.iterations(20);
110  opt.parse(argc,argv);
111  Script::run<Grocery,DFS,Options>(opt);
112  return 0;
113 }
114 
115 // STATISTICS: example-any
116