Generated on Thu Jan 16 2025 00:00:00 for Gecode by doxygen 1.14.0
all-interval.cpp
Go to the documentation of this file.
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, 2006
8 *
9 * This file is part of Gecode, the generic constraint
10 * development environment:
11 * http://www.gecode.org
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files (the
15 * "Software"), to deal in the Software without restriction, including
16 * without limitation the rights to use, copy, modify, merge, publish,
17 * distribute, sublicense, and/or sell copies of the Software, and to
18 * permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 *
32 */
33
34#include <gecode/driver.hh>
35#include <gecode/int.hh>
36#include <gecode/minimodel.hh>
37
38#include <cstdlib>
39
40using namespace Gecode;
41
62class AllInterval : public Script {
63private:
68public:
71 Script(opt),
72 x(*this, opt.size(), 0, opt.size()-1),
73 d(*this, opt.size()-1, 1, opt.size()-1) {
74 const int n = x.size();
75
76 // Set up variables for distance
77 for (int i=0; i<n-1; i++)
78 rel(*this, d[i] == abs(x[i+1]-x[i]), opt.ipl());
79
80 distinct(*this, x, opt.ipl());
81 distinct(*this, d, opt.ipl());
82
83 // Break mirror symmetry
84 rel(*this, x[0], IRT_LE, x[1]);
85 // Break symmetry of dual solution
86 rel(*this, d[0], IRT_GR, d[n-2]);
87
89 }
90
92 : Script(s) {
93 x.update(*this, s.x);
94 d.update(*this, s.d);
95 }
96
97 virtual Space*
98 copy(void) {
99 return new AllInterval(*this);
100 }
101
102 virtual void
103 print(std::ostream& os) const {
104 const int n = x.size();
105 os << "\tx[" << n << "] = {";
106 for (int i = 0; i < n-1; i++)
107 os << x[i] << "(" << d[i] << "),";
108 os << x[n-1] << "}" << std::endl;
109 }
110};
111
112
116int
117main(int argc, char* argv[]){
118 SizeOptions opt("AllInterval");
119 opt.size(1000);
120 opt.iterations(5);
121 opt.ipl(IPL_BND);
122 opt.parse(argc, argv);
123 if (opt.size() < 2) {
124 std::cerr << "size must be at least 2!" << std::endl;
125 return -1;
126 }
128 return 0;
129}
130
131// STATISTICS: example-any
132
AllInterval(AllInterval &s)
Constructor for cloning e.
int main(int argc, char *argv[])
Main-function.
virtual void print(std::ostream &os) const
Print solution.
virtual Space * copy(void)
Copy during cloning.
AllInterval(const SizeOptions &opt)
Actual model.
static void run(const Options &opt, Script *s=NULL)
Integer variable array.
Definition int.hh:772
Options for scripts with additional size parameter
Definition driver.hh:675
Computation spaces.
Definition core.hpp:1744
void parse(int argc, char *argv[])
Parse commandline arguments.
Definition test.cpp:120
Driver::ScriptBase< Driver::IgnoreStepOption< Space > > Script
Base-class for scripts.
Definition driver.hh:801
void branch(Home home, const FloatVarArgs &x, FloatVarBranch vars, FloatValBranch vals, FloatBranchFilter bf=nullptr, FloatVarValPrint vvp=nullptr)
Branch over x with variable selection vars and value selection vals.
Definition branch.cpp:39
void rel(Home home, FloatVar x0, FloatRelType frt, FloatVar x1)
Post propagator for .
Definition rel.cpp:68
@ IRT_LE
Less ( )
Definition int.hh:944
@ IRT_GR
Greater ( )
Definition int.hh:946
@ IPL_BND
Bounds propagation.
Definition int.hh:993
Gecode toplevel namespace
IntValBranch INT_VAL_SPLIT_MIN(void)
Select values not greater than mean of smallest and largest value.
Definition val.hpp:75
void distinct(Home home, const IntVarArgs &x, IntPropLevel ipl=IPL_DEF)
Post propagator for for all .
Definition distinct.cpp:46
void abs(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
IntVarBranch INT_VAR_SIZE_MIN(BranchTbl tbl=nullptr)
Select variable with smallest domain size.
Definition var.hpp:206