結果
問題 | No.240 ナイト散歩 |
ユーザー |
|
提出日時 | 2019-09-12 18:11:36 |
言語 | Java (openjdk 23) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,152 bytes |
コンパイル時間 | 2,392 ms |
コンパイル使用メモリ | 77,828 KB |
実行使用メモリ | 36,964 KB |
最終ジャッジ日時 | 2024-07-02 17:09:10 |
合計ジャッジ時間 | 4,911 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 25 WA * 5 |
ソースコード
import java.util.*;import java.io.*;public class Main {static long[] dx = { -2, -2, -1, -1, 1, 1, 2, 2 };static long[] dy = { -1, 1, -2, 2, -2, 2, -1, 1 };static long ex;static long ey;public static void main(String[] args) {FastScanner sc = new FastScanner();ex = sc.nextLong();ey = sc.nextLong();if (dfs(0, 0, 0)) {System.out.println("YES");return;}System.out.println("NO");}public static boolean dfs(long x, long y, int cnt) {if (x == ex && y == ey) {return true;}if (cnt >= 4) {return false;}for (int i = 0; i < 8; i++) {long nx = x + dx[i];long ny = y + dy[i];if (dfs(nx, ny, cnt + 1)) {return true;}}return false;}}class FastScanner {private final InputStream in = System.in;private final byte[] buffer = new byte[1024];private int ptr = 0;private int buflen = 0;private boolean hasNextByte() {if (ptr < buflen) {return true;} else {ptr = 0;try {buflen = in.read(buffer);} catch (IOException e) {e.printStackTrace();}if (buflen <= 0) {return false;}}return true;}private int readByte() {if (hasNextByte())return buffer[ptr++];elsereturn -1;}private static boolean isPrintableChar(int c) {return 33 <= c && c <= 126;}public boolean hasNext() {while (hasNextByte() && !isPrintableChar(buffer[ptr]))ptr++;return hasNextByte();}public String next() {if (!hasNext())throw new NoSuchElementException();StringBuilder sb = new StringBuilder();int b = readByte();while (isPrintableChar(b)) {sb.appendCodePoint(b);b = readByte();}return sb.toString();}public long nextLong() {if (!hasNext())throw new NoSuchElementException();long n = 0;boolean minus = false;int b = readByte();if (b == '-') {minus = true;b = readByte();}if (b < '0' || '9' < b) {throw new NumberFormatException();}while (true) {if ('0' <= b && b <= '9') {n *= 10;n += b - '0';} else if (b == -1 || !isPrintableChar(b)) {return minus ? -n : n;} else {throw new NumberFormatException();}b = readByte();}}public int nextInt() {long nl = nextLong();if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)throw new NumberFormatException();return (int) nl;}public double nextDouble() {return Double.parseDouble(next());}}