143 lines
4.0 KiB
C++
Executable File
143 lines
4.0 KiB
C++
Executable File
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2001
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <gecode/driver.hh>
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#include <gecode/int.hh>
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#include <gecode/minimodel.hh>
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using namespace Gecode;
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/**
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* \brief %Example: SEND+MORE=MONEY puzzle
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*
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* Well-known cryptoarithmetic puzzle.
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* Henry Dudeney, Strand Magazine, July 1924.
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*
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* \ingroup Example
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*
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*/
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class Money : public Script {
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protected:
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/// Number of letters
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static const int nl = 8;
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/// Array of letters
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IntVarArray le;
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public:
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/// Model variants
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enum {
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MODEL_SINGLE, ///< Use single linear equation
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MODEL_CARRY ///< Use carries
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};
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/// Actual model
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Money(const Options& opt) : Script(opt), le(*this,nl,0,9) {
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IntVar
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s(le[0]), e(le[1]), n(le[2]), d(le[3]),
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m(le[4]), o(le[5]), r(le[6]), y(le[7]);
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if (opt.trace()) {
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trace(*this, le, opt.trace());
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trace(*this, opt.trace());
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}
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rel(*this, s, IRT_NQ, 0);
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rel(*this, m, IRT_NQ, 0);
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distinct(*this, le, opt.ipl());
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switch (opt.model()) {
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case MODEL_SINGLE:
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rel(*this, 1000*s+100*e+10*n+d
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+ 1000*m+100*o+10*r+e
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== 10000*m+1000*o+100*n+10*e+y,
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opt.ipl());
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break;
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case MODEL_CARRY:
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{
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IntVar c0(*this,0,1), c1(*this,0,1), c2(*this,0,1), c3(*this,0,1);
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rel(*this, d+e == y+10*c0, opt.ipl());
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rel(*this, c0+n+r == e+10*c1, opt.ipl());
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rel(*this, c1+e+o == n+10*c2, opt.ipl());
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rel(*this, c2+s+m == o+10*c3, opt.ipl());
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rel(*this, c3 == m, opt.ipl());
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}
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break;
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default: GECODE_NEVER;
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}
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branch(*this, le, INT_VAR_SIZE_MIN(), INT_VAL_MIN(), nullptr,
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[](const Space&, const Brancher&, unsigned int a,
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IntVar, int i, const int& n,
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std::ostream& o) {
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static char name[8] = {'s','e','n','d',
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'm','o','r','y'};
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o << name[i]
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<< ((a == 0) ? " = " : " != ")
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<< n;
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});
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}
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/// Print solution
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virtual void
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print(std::ostream& os) const {
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os << "\t" << le << std::endl;
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}
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/// Constructor for cloning \a s
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Money(Money& s) : Script(s) {
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le.update(*this, s.le);
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}
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/// Copy during cloning
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virtual Space*
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copy(void) {
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return new Money(*this);
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}
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};
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/** \brief Main-function
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* \relates Money
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*/
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int
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main(int argc, char* argv[]) {
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Options opt("SEND+MORE=MONEY");
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opt.model(Money::MODEL_SINGLE);
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opt.model(Money::MODEL_SINGLE, "single", "use single linear equation");
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opt.model(Money::MODEL_CARRY, "carry", "use carry");
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opt.solutions(0);
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opt.iterations(20000);
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opt.parse(argc,argv);
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Script::run<Money,DFS,Options>(opt);
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return 0;
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}
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// STATISTICS: example-any
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