OneSidedPentomino.java
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上传日期:2018-01-08
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- /**
- * 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.");
- }
- }