/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ /* * Main authors: * Christian Schulte <schulte@gecode.org> * * Copyright: * Christian Schulte, 2004 * * Last modified: * $Date: 2010-10-07 20:52:01 +1100 (Thu, 07 Oct 2010) $ by $Author: schulte $ * $Revision: 11473 $ * * This file is part of Gecode, the generic constraint * development environment: * http://www.gecode.org * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #include <gecode/driver.hh> #include <gecode/int.hh> using namespace Gecode; /** * \brief %Example: Orthogonal latin squares * * \ingroup Example */ class OrthoLatinSquare : public Script { protected: /// Size of squares const int n; /// Fields of first square IntVarArray x1; /// Fields of second square IntVarArray x2; public: /// Access field at position \a i and \a j in first square IntVar& y1(int i, int j) { return x1[i*n+j]; } /// Access field at position \a i and \a j in first square const IntVar& y1(int i, int j) const { return x1[i*n+j]; } /// Access field at position \a i and \a j in second square IntVar& y2(int i, int j) { return x2[i*n+j]; } /// Access field at position \a i and \a j in second square const IntVar& y2(int i, int j) const { return x2[i*n+j]; } /// Actual model OrthoLatinSquare(const SizeOptions& opt) : n(opt.size()), x1(*this,n*n,1,n), x2(*this,n*n,1,n) { const int nn = n*n; IntVarArgs z(*this,nn,0,n*n-1); distinct(*this, z, opt.icl()); // Connect { IntArgs mod(n*n); IntArgs div(n*n); for (int i=0; i<n; i++) for (int j=0; j<n; j++) { mod[i*n+j] = j+1; div[i*n+j] = i+1; } for (int i = nn; i--; ) { element(*this, div, z[i], x2[i]); element(*this, mod, z[i], x1[i]); } } // Rows for (int i = n; i--; ) { IntVarArgs ry(n); for (int j = n; j--; ) ry[j] = y1(i,j); distinct(*this, ry, opt.icl()); for (int j = n; j--; ) ry[j] = y2(i,j); distinct(*this, ry, opt.icl()); } for (int j = n; j--; ) { IntVarArgs cy(n); for (int i = n; i--; ) cy[i] = y1(i,j); distinct(*this, cy, opt.icl()); for (int i = n; i--; ) cy[i] = y2(i,j); distinct(*this, cy, opt.icl()); } for (int i = 1; i<n; i++) { IntVarArgs ry1(n); IntVarArgs ry2(n); for (int j = n; j--; ) { ry1[j] = y1(i-1,j); ry2[j] = y2(i,j); } rel(*this, ry1, IRT_GQ, ry2); } branch(*this, z, INT_VAR_SIZE_MIN, INT_VAL_SPLIT_MIN); } /// Constructor for cloning \a s OrthoLatinSquare(bool share, OrthoLatinSquare& s) : Script(share,s), n(s.n) { x1.update(*this, share, s.x1); x2.update(*this, share, s.x2); } /// Copy during cloning virtual Space* copy(bool share) { return new OrthoLatinSquare(share,*this); } /// Print solution virtual void print(std::ostream& os) const { for (int i = 0; i<n; i++) { os << "\t"; for (int j = 0; j<n; j++) { os.width(2); os << y1(i,j) << " "; } os << std::endl; } os << std::endl; for (int i = 0; i<n; i++) { os << "\t"; for (int j = 0; j<n; j++) { os.width(2); os << y2(i,j) << " "; } os << std::endl; } os << std::endl; } }; /** * \brief Main function * \relates OrthoLatinSquare */ int main(int argc, char* argv[]) { SizeOptions opt("OrthoLatinSquare"); opt.size(7); opt.icl(ICL_DOM); opt.parse(argc,argv); Script::run<OrthoLatinSquare,DFS,SizeOptions>(opt); return 0; } // STATISTICS: example-any