結果
| 問題 | 
                            No.697 池の数はいくつか
                             | 
                    
| ユーザー | 
                             | 
                    
| 提出日時 | 2018-06-09 17:12:56 | 
| 言語 | Java  (openjdk 23)  | 
                    
| 結果 | 
                             
                                MLE
                                 
                             
                            
                         | 
                    
| 実行時間 | - | 
| コード長 | 3,069 bytes | 
| コンパイル時間 | 2,940 ms | 
| コンパイル使用メモリ | 78,632 KB | 
| 実行使用メモリ | 667,456 KB | 
| 最終ジャッジ日時 | 2024-11-25 12:28:12 | 
| 合計ジャッジ時間 | 11,976 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge2 / judge4 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 30 MLE * 2 | 
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;
public class Main implements Runnable {
	public static void main(String[] args) {
		new Thread(null,new Main(),"",Runtime.getRuntime().maxMemory()).run();
	}
	public void run() {
		FastScanner sc = new FastScanner();
		int H = sc.nextInt();
		int W = sc.nextInt();
		int[][] A = new int[H][W];
		for (int i = 0; i < H; ++i) {
			for (int j = 0; j < W; ++j) {
				A[i][j] = sc.nextInt();
			}
		}
		int col = -1;
		for (int i = 0; i < H; ++i) {
			for (int j = 0; j < W; ++j) {
				if (A[i][j] != 1)
					continue;
				go(W, H, j, i, A, col);
				--col;
			}
		}
		System.out.println(-col - 1);
	}
	void go(int W, int H, int x, int y, int[][] A, int col) {
		if (A[y][x] != 1)
			return;
		A[y][x] = col;
		for (int dx = -1; dx <= 1; ++dx) {
			for (int dy = -1; dy <= 1; ++dy) {
				if (Math.abs(dx) + Math.abs(dy) != 1)
					continue;
				if (x + dx >= W || x + dx < 0 || y + dy >= H || y + dy < 0)
					continue;
				if (A[dy + y][dx + x] == 1) {
					go(W, H, dx + x, dy + y, A, col);
				}
			}
		}
	}
	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 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());
		}
	}
	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}