結果

問題 No.179 塗り分け
コンテスト
ユーザー t8m8⛄️
提出日時 2015-04-06 04:06:52
言語 Java
(openjdk 23)
結果
AC  
実行時間 115 ms / 3,000 ms
コード長 4,993 bytes
コンパイル時間 3,823 ms
コンパイル使用メモリ 78,768 KB
実行使用メモリ 50,300 KB
最終ジャッジ日時 2024-07-23 14:27:57
合計ジャッジ時間 7,501 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 * 6
other AC * 40
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 # 

//No.179 塗り分け 解説

import java.util.*;
import java.io.*;
import static java.util.Arrays.*;
import static java.lang.Math.*;

public class No179 {

    static final Reader in = new Reader();
    static final PrintWriter out = new PrintWriter(System.out,false);

    static void solve(){
        int h = in.nextInt();
        int w = in.nextInt();
        int cnt = 0;
        char[][] cs = new char[h][w];
        for (int i=0; i<h; i++) {
            for (int j=0; j<w; j++) {
                cs[i][j] = in.nextChar();
                if (cs[i][j] == '#') cnt++;
            }
        }
        if (cnt%2 == 1 || cnt == 0) {
            out.println("NO");
            return;
        }

        BitSet bs = new BitSet(h*w);
        for (int di=0; di<h; di++) {
            for (int dj=(di==0 ? 1 : -w+1); dj<w; dj++) {
                boolean flag = true;
                outer:
                for (int i=0; i<h; i++) {
                    for (int j=0; j<w; j++) {
                        if (cs[i][j] != '#' || bs.get(i*w+j)) continue;
                        int ni = i+di;
                        int nj = j+dj;
                        if (ni < 0 || h <= ni || nj < 0 || w <= nj || cs[ni][nj] != '#') {
                            flag = false;
                            break outer;
                        }
                        bs.set(ni*w+nj);
                    }
                }
                if (flag) {
                    out.println("YES");
                    return;
                }
                bs.clear();
            }
        }

        out.println("NO");
    }

    public static void main(String[] args) throws Exception {
        long start = System.currentTimeMillis();

        solve();
        out.flush();

        long end = System.currentTimeMillis();
        //trace(end-start + "ms");
        in.close();
        out.close();
    }

    static void trace(Object... o) { System.out.println(deepToString(o));}
}

class Reader {
    private final InputStream in;
    private final byte[] buf = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;

    public Reader() { this(System.in);}
    public Reader(InputStream source) { this.in = source;}

    private boolean hasNextByte() {
        if (ptr < buflen) return true;
        ptr = 0;
        try{
            buflen = in.read(buf);
        }catch (IOException e) {e.printStackTrace();}
        if (buflen <= 0) return false;
        return true;
    }

    private int readByte() { if (hasNextByte()) return buf[ptr++]; else return -1;}

    private boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}

    private void skip() { while(hasNextByte() && !isPrintableChar(buf[ptr])) ptr++;}

    public boolean hasNext() {skip(); 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();
        boolean minus = false;
        long num = readByte();

        if(num == '-'){
            num = 0;
            minus = true;
        }else if (num < '0' || '9' < num){
            throw new NumberFormatException();
        }else{
            num -= '0';
        }
        
        while(true){
            int b = readByte();
            if('0' <= b && b <= '9')
                num = num * 10 + (b - '0');
            else if(b == -1 || !isPrintableChar(b))
                return minus ? -num : num;
            else
                throw new NoSuchElementException();
        }
    }

    public int nextInt() {
        long num = nextLong();
        if (num < Integer.MIN_VALUE || Integer.MAX_VALUE < num)
            throw new NumberFormatException();
        return (int)num;
    }

    public double nextDouble() {
        return Double.parseDouble(next());
    }

    public char nextChar() {
        if (!hasNext()) throw new NoSuchElementException();
        return (char)readByte();
    }

    public String nextLine() {
        while (hasNextByte() && (buf[ptr] == '\n' || buf[ptr] == '\r')) ptr++;
        if (!hasNextByte()) throw new NoSuchElementException();

        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while (b != '\n' && b != '\r') {
            sb.appendCodePoint(b);
            b = readByte();
        }

        return sb.toString();
    }

    public int[] nextIntArray(int n) {
        int[] res = new int[n];
        for (int i=0; i<n; i++) res[i] = nextInt();
        return res;
    }

    public char[] nextCharArray(int n) {
        char[] res = new char[n];
        for (int i=0; i<n; i++) res[i] = nextChar();
        return res;
    }

    public void close() {try{ in.close();}catch(IOException e){ e.printStackTrace();}};
}
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