結果
| 問題 |
No.240 ナイト散歩
|
| ユーザー |
nCk_cv
|
| 提出日時 | 2016-07-13 16:05:14 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 51 ms / 2,000 ms |
| コード長 | 3,572 bytes |
| コンパイル時間 | 2,332 ms |
| コンパイル使用メモリ | 78,144 KB |
| 実行使用メモリ | 50,220 KB |
| 最終ジャッジ日時 | 2024-10-07 21:27:05 |
| 合計ジャッジ時間 | 4,669 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 * 30 |
ソースコード
import java.io.*;
import java.math.*;
import java.util.*;
import java.util.Map.Entry;
class Main {
static int[] vy = {1,0,-1,0};
static int[] vx = {0,1,0,-1};
static long mod = 1000000007;
static int[][] v = {{-2,-1},{-2,+1},{-1,-2},{-1,+2},{+1,-2},{+1,+2},{+2,-1},{+2,+1}};
static HashMap<String,Boolean> map = new HashMap<String,Boolean>();
public static void main(String[] args) {
FastScanner sc = new FastScanner();
//Scanner sc = new Scanner(System.in);
int X = sc.nextInt();
int Y = sc.nextInt();
boolean ok = dfs(0,0,X,Y,0);
if(ok) System.out.println("YES");
else System.out.println("NO");
}
static boolean dfs(int x, int y, int GX, int GY, int c) {
if(x == GX && y == GY) return true;
if(c == 3) return false;
for(int i = 0; i < v.length; i++) {
int tx = x + v[i][0];
int ty = y + v[i][1];
if(dfs(tx,ty,GX,GY,c+1)) return true;
}
return false;
}
static 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++]; else return -1;}
private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}
public boolean hasNext() { skipUnprintable(); 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() {
if (!hasNext()) throw new NoSuchElementException();
int 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();
}
}
}
}
nCk_cv