結果

問題 No.228 ゆきこちゃんの 15 パズル
コンテスト
ユーザー threepipes_s
提出日時 2015-06-19 22:46:31
言語 Java
(openjdk 23)
結果
AC  
実行時間 47 ms / 5,000 ms
コード長 3,785 bytes
コンパイル時間 1,925 ms
コンパイル使用メモリ 79,132 KB
実行使用メモリ 50,604 KB
最終ジャッジ日時 2024-07-07 04:08:39
合計ジャッジ時間 3,451 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge3
このコードへのチャレンジ
（要ログイン）
ファイルパターン 結果
sample AC * 3
other AC * 17
権限があれば一括ダウンロードができます

ソースコード

diff # 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.TreeMap;

public class Main {
	public static int[] dp;
	public static void main(String[] args) throws NumberFormatException,
	IOException {
		ContestScanner in = new ContestScanner();
		int[][] board = new int[4][4];
		goal = new int[4][4];
		for(int i=0; i<4; i++){
			for(int j=0; j<4; j++){
				goal[i][j] = in.nextInt();
			}
		}
		for(int i=0; i<4; i++){
			for(int j=0; j<4; j++){
				board[i][j] = i*4+j+1;
			}
		}
		board[3][3] = 0;
		if(dfs(board, 0, 3, 3)) System.out.println("Yes");
		else System.out.println("No");
	}
	public static int[] dx = {1, 0, -1, 0};
	public static int[] dy = {0, 1, 0, -1};
	public static int[][] goal;
	public static boolean dfs(int[][] board, int slide, int zx, int zy){
		if(check(board)) return true;
		for(int i=0; i<4; i++){
			int nx = zx+dx[i];
			int ny = zy+dy[i];
			if(nx < 0 || nx >= 4 || ny < 0 || ny >= 4) continue;
			if((slide&1<<board[ny][nx])>0) continue;
			int tmp = board[ny][nx];
			board[ny][nx] = 0;
			board[zy][zx] = tmp;
			if(dfs(board, slide|1<<tmp, nx, ny)) return true;
			board[zy][zx] = 0;
			board[ny][nx] = tmp;
		}
		return false;
	}
	
	public static boolean check(int[][] board){
		for(int i=0; i<4; i++){
			for(int j=0; j<4; j++){
				if(board[i][j] != goal[i][j]) return false;
			}
		}
		return true;
	}
}

class Timer{
	long time;
	public void set(){
		time = System.currentTimeMillis();
	}
	
	public long stop(){
		return System.currentTimeMillis()-time;
	}
}

class Node{
	int id;
	ArrayList<Node> edge = new ArrayList<Node>();
	public Node(int id) {
		this.id = id;
	}
	public void createEdge(Node node) {
		edge.add(node);
	}
}

class MyComp implements Comparator<int[]> {
	final int idx;
	public MyComp(int idx){
		this.idx = idx;
	}
	public int compare(int[] a, int[] b) {
		return a[idx] - b[idx];
	}
}

class Reverse implements Comparator<Integer> {
	public int compare(Integer arg0, Integer arg1) {
		return arg1 - arg0;
	}
}


class ContestWriter {
	private PrintWriter out;

	public ContestWriter(String filename) throws IOException {
		out = new PrintWriter(new BufferedWriter(new FileWriter(filename)));
	}

	public ContestWriter() throws IOException {
		out = new PrintWriter(System.out);
	}

	public void println(String str) {
		out.println(str);
	}
	
	public void println(Object obj) {
		out.println(obj);
	}

	public void print(String str) {
		out.print(str);
	}
	
	public void print(Object obj) {
		out.print(obj);
	}

	public void close() {
		out.close();
	}
}

class ContestScanner {
	private BufferedReader reader;
	private String[] line;
	private int idx;

	public ContestScanner() throws FileNotFoundException {
		reader = new BufferedReader(new InputStreamReader(System.in));
	}

	public ContestScanner(String filename) throws FileNotFoundException {
		reader = new BufferedReader(new InputStreamReader(new FileInputStream(
				filename)));
	}

	public String nextToken() throws IOException {
		if (line == null || line.length <= idx) {
			line = reader.readLine().trim().split(" ");
			idx = 0;
		}
		return line[idx++];
	}
	
	public String readLine() throws IOException{
		return reader.readLine();
	}

	public long nextLong() throws IOException, NumberFormatException {
		return Long.parseLong(nextToken());
	}

	public int nextInt() throws NumberFormatException, IOException {
		return (int) nextLong();
	}

	public double nextDouble() throws NumberFormatException, IOException {
		return Double.parseDouble(nextToken());
	}
}
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