結果
| 問題 |
No.13 囲みたい!
|
| コンテスト | |
| ユーザー |
fujisu
|
| 提出日時 | 2015-02-04 04:59:05 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 667 ms / 5,000 ms |
| コード長 | 3,405 bytes |
| コンパイル時間 | 2,181 ms |
| コンパイル使用メモリ | 85,492 KB |
| 実行使用メモリ | 60,256 KB |
| 最終ジャッジ日時 | 2024-10-13 10:40:42 |
| 合計ジャッジ時間 | 5,411 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 16 |
ソースコード
import java.io.IOException;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.LinkedList;
import java.util.List;
public class Main {
List<Integer>[] e;
boolean[] visit;
boolean dfs(int pre, int k) {
if (visit[k]) {
return true;
}
visit[k] = true;
for (Integer to : e[k]) {
if (to == pre) {
continue;
}
if (dfs(k, to)) {
return true;
}
}
return false;
}
void run() {
MyScanner sc = new MyScanner();
int w = sc.nextInt();
int h = sc.nextInt();
int[][] m = new int[h][w];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
m[i][j] = sc.nextInt();
}
}
int[] dx = { -1, 0, 0, 1 };
int[] dy = { 0, -1, 1, 0 };
e = new LinkedList[w * h];
for (int i = 0; i < w * h; i++) {
e[i] = new LinkedList<Integer>();
}
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
for (int k = 0; k < 4; k++) {
int nx = j + dx[k];
int ny = i + dy[k];
if (nx < 0 || w <= nx || ny < 0 || h <= ny) {
continue;
}
if (m[i][j] == m[ny][nx]) {
int s = i * w + j;
int t = ny * w + nx;
e[s].add(t);
}
}
}
}
boolean f = false;
visit = new boolean[w * h];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
Arrays.fill(visit, false);
if (dfs(-1, i * w + j)) {
f = true;
break;
}
}
}
System.out.println(f ? "possible" : "impossible");
}
public static void main(String[] args) {
new Main().run();
}
public void mapDebug(int[][] a) {
System.out.println("--------map display---------");
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
System.out.printf("%3d ", a[i][j]);
}
System.out.println();
}
System.out.println("----------------------------" + '\n');
}
class MyScanner {
int read() {
try {
return System.in.read();
} catch (IOException e) {
throw new InputMismatchException();
}
}
boolean isSpaceChar(int c) {
return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
}
boolean isEndline(int c) {
return c == '\n' || c == '\r' || c == -1;
}
int nextInt() {
return Integer.parseInt(next());
}
int[] nextIntArray(int n) {
int[] array = new int[n];
for (int i = 0; i < n; i++)
array[i] = nextInt();
return array;
}
long nextLong() {
return Long.parseLong(next());
}
long[] nextLongArray(int n) {
long[] array = new long[n];
for (int i = 0; i < n; i++)
array[i] = nextLong();
return array;
}
double nextDouble() {
return Double.parseDouble(next());
}
double[] nextDoubleArray(int n) {
double[] array = new double[n];
for (int i = 0; i < n; i++)
array[i] = nextDouble();
return array;
}
String next() {
int c = read();
while (isSpaceChar(c))
c = read();
StringBuilder res = new StringBuilder();
do {
res.appendCodePoint(c);
c = read();
} while (!isSpaceChar(c));
return res.toString();
}
String[] nextStringArray(int n) {
String[] array = new String[n];
for (int i = 0; i < n; i++)
array[i] = next();
return array;
}
String nextLine() {
int c = read();
while (isEndline(c))
c = read();
StringBuilder res = new StringBuilder();
do {
res.appendCodePoint(c);
c = read();
} while (!isEndline(c));
return res.toString();
}
}
}
fujisu