org.chocosolver.samples.nqueen.NQueenBinaryGlobal Maven / Gradle / Ivy
/**
* Copyright (c) 2015, Ecole des Mines de Nantes
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the .
* 4. Neither the name of the nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.chocosolver.samples.nqueen;
import org.chocosolver.solver.constraints.IntConstraintFactory;
import org.chocosolver.solver.variables.IntVar;
import org.chocosolver.solver.variables.VariableFactory;
/**
*
*
* @author Charles Prud'homme
* @since 31/03/11
*/
public class NQueenBinaryGlobal extends AbstractNQueen {
@Override
public void buildModel() {
vars = new IntVar[n];
for (int i = 0; i < vars.length; i++) {
vars[i] = VariableFactory.enumerated("Q_" + i, 1, n, solver);
}
solver.post(IntConstraintFactory.alldifferent(vars, "BC"));
for (int i = 0; i < n - 1; i++) {
for (int j = i + 1; j < n; j++) {
int k = j - i;
solver.post(IntConstraintFactory.arithm(vars[i], "!=", vars[j], "+", -k));
solver.post(IntConstraintFactory.arithm(vars[i], "!=", vars[j], "+", k));
}
}
}
public static void main(String[] args) {
new NQueenBinaryGlobal().execute(args);
}
}