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00040 #include "examples/support.hh"
00041 #include "gecode/minimodel.hh"
00042
00057 class MagicSequence : public Example {
00058 private:
00060 const int n;
00062 IntVarArray s;
00063 public:
00065 enum {
00066 PROP_REIFIED,
00067 PROP_COUNT,
00068 PROP_GCC
00069 };
00071 void
00072 exactly(IntVarArray& v, IntVar& x, int i) {
00073
00074 BoolVarArgs b(v.size());
00075 for (int j = v.size(); j--; )
00076 b[j] = post(this, ~(v[j] == i));
00077 linear(this, b, IRT_EQ, x);
00078 }
00080 MagicSequence(const SizeOptions& opt)
00081 : n(opt.size()), s(this,n,0,n-1) {
00082 switch (opt.propagation()) {
00083 case PROP_REIFIED:
00084 for (int i=n; i--; )
00085 exactly(s, s[i], i);
00086 linear(this, s, IRT_EQ, n);
00087 break;
00088 case PROP_COUNT:
00089 for (int i=n; i--; )
00090 count(this, s, i, IRT_EQ, s[i]);
00091 linear(this, s, IRT_EQ, n);
00092 break;
00093 case PROP_GCC:
00094 count(this, s, s, opt.icl());
00095 break;
00096 }
00097 IntArgs c(n);
00098 for (int j = n; j--; )
00099 c[j] = j-1;
00100 linear(this, c, s, IRT_EQ, 0);
00101 branch(this, s, INT_VAR_NONE, INT_VAL_SPLIT_MAX);
00102 }
00103
00105 MagicSequence(bool share, MagicSequence& e) : Example(share,e), n(e.n) {
00106 s.update(this, share, e.s);
00107 }
00109 virtual Space*
00110 copy(bool share) {
00111 return new MagicSequence(share,*this);
00112 }
00114 virtual
00115 void print(std::ostream& os) {
00116 os << "\t";
00117 for (int i = 0; i<n; i++) {
00118 os << s[i] << ", ";
00119 if ((i+1) % 20 == 0)
00120 os << std::endl << "\t";
00121 }
00122 os << std::endl;
00123 }
00124
00125 };
00126
00130 int
00131 main(int argc, char* argv[]) {
00132 SizeOptions opt("MagicSequence");
00133 opt.solutions(0);
00134 opt.iterations(4);
00135 opt.size(500);
00136 opt.propagation(MagicSequence::PROP_COUNT);
00137 opt.propagation(MagicSequence::PROP_REIFIED, "reified");
00138 opt.propagation(MagicSequence::PROP_COUNT, "count");
00139 opt.propagation(MagicSequence::PROP_GCC, "gcc");
00140 opt.parse(argc,argv);
00141 Example::run<MagicSequence,DFS,SizeOptions>(opt);
00142 return 0;
00143 }
00144
00145
00146