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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
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9  * Last modified:
10  * $Date: 2013-07-08 14:22:40 +0200 (Mon, 08 Jul 2013) $ by $Author: schulte $
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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 
Example: Grocery puzzle
Definition: grocery.cpp:60
IntVarBranch INT_VAR_NONE(void)
Select first unassigned variable.
Definition: var.hpp:108
Less or equal ( )
Definition: int.hh:906
Integer variable array.
Definition: int.hh:741
Computation spaces.
Definition: core.hpp:1362
Parametric base-class for scripts.
Definition: driver.hh:622
void iterations(unsigned int i)
Set default number of iterations.
Definition: options.hpp:385
virtual Space * copy(bool share)
Copy during cloning.
Definition: grocery.cpp:92
Gecode::IntSet d(v, 7)
Grocery(const Options &opt)
The actual model.
Definition: grocery.cpp:70
void update(Space &, bool share, VarArray< Var > &a)
Update array to be a clone of array a.
Definition: array.hpp:1072
Gecode::FloatVal c(-8, 8)
int main(int argc, char *argv[])
Main-function.
Definition: grocery.cpp:107
IntVarArray abcd
The price of each item.
Definition: grocery.cpp:63
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
Options opt
The options.
Definition: test.cpp:101
IntValBranch INT_VAL_SPLIT_MAX(void)
Select values greater than mean of smallest and largest value.
Definition: val.hpp:93
void parse(int &argc, char *argv[])
Parse options from arguments argv (number is argc)
Definition: options.cpp:331
Integer variables.
Definition: int.hh:350
void rel(Home home, FloatVar x0, FloatRelType frt, FloatVal n)
Propagates .
Definition: rel.cpp:47
Grocery(bool share, Grocery &s)
Constructor for cloning s.
Definition: grocery.cpp:86
virtual void print(std::ostream &os) const
Print solution.
Definition: grocery.cpp:98
struct Gecode::@518::NNF::@57::@58 b
For binary nodes (and, or, eqv)
Gecode toplevel namespace
BrancherHandle branch(Home home, const FloatVarArgs &x, FloatVarBranch vars, FloatValBranch vals, FloatBranchFilter bf, FloatVarValPrint vvp)
Branch over x with variable selection vars and value selection vals.
Definition: branch.cpp:43
Options for scripts
Definition: driver.hh:326
void icl(IntConLevel i)
Set default integer consistency level.
Definition: options.hpp:194
struct Gecode::@518::NNF::@57::@59 a
For atomic nodes.