| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.examples.dancing; |
| |
| /** |
| * Of the "normal" 12 pentominos, 6 of them have distinct shapes when flipped. |
| * This class includes both variants of the "flippable" shapes and the |
| * unflippable shapes for a total of 18 pieces. Clearly, the boards must have |
| * 18*5=90 boxes to hold all of the solutions. |
| */ |
| public class OneSidedPentomino extends Pentomino { |
| |
| public OneSidedPentomino() {} |
| |
| public OneSidedPentomino(int width, int height) { |
| super(width, height); |
| } |
| |
| /** |
| * Define the one sided pieces. The flipped pieces have the same name with |
| * a capital letter. |
| */ |
| protected void initializePieces() { |
| pieces.add(new Piece("x", " x /xxx/ x ", false, oneRotation)); |
| pieces.add(new Piece("v", "x /x /xxx", false, fourRotations)); |
| pieces.add(new Piece("t", "xxx/ x / x ", false, fourRotations)); |
| pieces.add(new Piece("w", " x/ xx/xx ", false, fourRotations)); |
| pieces.add(new Piece("u", "x x/xxx", false, fourRotations)); |
| pieces.add(new Piece("i", "xxxxx", false, twoRotations)); |
| pieces.add(new Piece("f", " xx/xx / x ", false, fourRotations)); |
| pieces.add(new Piece("p", "xx/xx/x ", false, fourRotations)); |
| pieces.add(new Piece("z", "xx / x / xx", false, twoRotations)); |
| pieces.add(new Piece("n", "xx / xxx", false, fourRotations)); |
| pieces.add(new Piece("y", " x /xxxx", false, fourRotations)); |
| pieces.add(new Piece("l", " x/xxxx", false, fourRotations)); |
| pieces.add(new Piece("F", "xx / xx/ x ", false, fourRotations)); |
| pieces.add(new Piece("P", "xx/xx/ x", false, fourRotations)); |
| pieces.add(new Piece("Z", " xx/ x /xx ", false, twoRotations)); |
| pieces.add(new Piece("N", " xx/xxx ", false, fourRotations)); |
| pieces.add(new Piece("Y", " x /xxxx", false, fourRotations)); |
| pieces.add(new Piece("L", "x /xxxx", false, fourRotations)); |
| } |
| |
| /** |
| * Solve the 3x30 puzzle. |
| * @param args |
| */ |
| public static void main(String[] args) { |
| Pentomino model = new OneSidedPentomino(3, 30); |
| int solutions = model.solve(); |
| System.out.println(solutions + " solutions found."); |
| } |
| |
| } |