結果

問題 No.479 頂点は要らない
ユーザー ぴろずぴろず
提出日時 2017-01-27 22:40:49
言語 Java21
(openjdk 21)
結果
AC  
実行時間 287 ms / 1,500 ms
コード長 4,640 bytes
コンパイル時間 2,613 ms
コンパイル使用メモリ 80,488 KB
実行使用メモリ 67,588 KB
最終ジャッジ日時 2024-06-06 04:51:58
合計ジャッジ時間 8,441 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 54 ms
49,832 KB
testcase_01 AC 54 ms
50,392 KB
testcase_02 AC 55 ms
49,968 KB
testcase_03 AC 54 ms
50,088 KB
testcase_04 AC 54 ms
50,304 KB
testcase_05 AC 55 ms
50,260 KB
testcase_06 AC 54 ms
50,228 KB
testcase_07 AC 53 ms
50,316 KB
testcase_08 AC 55 ms
49,880 KB
testcase_09 AC 53 ms
50,272 KB
testcase_10 AC 53 ms
50,424 KB
testcase_11 AC 53 ms
50,252 KB
testcase_12 AC 53 ms
50,272 KB
testcase_13 AC 54 ms
50,428 KB
testcase_14 AC 54 ms
50,268 KB
testcase_15 AC 55 ms
50,332 KB
testcase_16 AC 56 ms
49,952 KB
testcase_17 AC 54 ms
50,048 KB
testcase_18 AC 54 ms
50,236 KB
testcase_19 AC 57 ms
50,228 KB
testcase_20 AC 58 ms
50,200 KB
testcase_21 AC 56 ms
50,160 KB
testcase_22 AC 57 ms
50,380 KB
testcase_23 AC 56 ms
50,304 KB
testcase_24 AC 56 ms
50,296 KB
testcase_25 AC 56 ms
50,036 KB
testcase_26 AC 280 ms
67,588 KB
testcase_27 AC 287 ms
67,292 KB
testcase_28 AC 204 ms
64,896 KB
testcase_29 AC 168 ms
61,436 KB
testcase_30 AC 160 ms
61,596 KB
testcase_31 AC 153 ms
61,448 KB
testcase_32 AC 162 ms
61,536 KB
testcase_33 AC 203 ms
63,300 KB
testcase_34 AC 204 ms
63,992 KB
testcase_35 AC 162 ms
57,488 KB
testcase_36 AC 141 ms
57,112 KB
testcase_37 AC 215 ms
63,908 KB
testcase_38 AC 180 ms
61,540 KB
testcase_39 AC 159 ms
57,616 KB
testcase_40 AC 179 ms
61,848 KB
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 #

package no479;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;

public class Main {
	public static void main(String[] args) {
		IO io = new IO();
		int n = io.nextInt();
		int m = io.nextInt();
		ArrayList<Edge>[] g = new ArrayList[n];
		for(int i=0;i<n;i++) {
			g[i] = new ArrayList<>();
		}
		for(int i=0;i<m;i++) {
			int a = io.nextInt();
			int b = io.nextInt();
			Edge e1 = new Edge(b);
			Edge e2 = new Edge(a);
			e1.rev = e2;
			e2.rev = e1;
			g[a].add(e1);
			g[b].add(e2);
		}
		boolean[] ans = new boolean[n];
		for(int i=n-1;i>=0;i--) {
			if (ans[i]) continue;
			for(Edge e: g[i]) {
				if (!e.used) {
					ans[e.to] = true;
					e.used = true;
					e.rev.used = true;
				}
			}
		}
		StringBuilder sb = new StringBuilder();
		for(int i=n-1;i>=0;i--) {
			sb.append(ans[i] ? '1' : '0');
		}
		String s = sb.toString();
		s = s.substring(s.indexOf('1'));
		System.out.println(s);
	}

}
class Edge {
	int to;
	boolean used;
	Edge rev;
	public Edge(int to) {
		super();
		this.to = to;
	}
	
}
class IO extends PrintWriter {
	private final InputStream in;
	private final byte[] buffer = new byte[1024];
	private int ptr = 0;
	private int buflen = 0;
	
	public IO() { this(System.in);}
	public IO(InputStream source) { super(System.out); this.in = source;}
	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 static boolean isNewLine(int c) { return c == '\n' || c == '\r';}
	public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
	public boolean hasNextLine() { while(hasNextByte() && isNewLine(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 char[] nextCharArray(int len) {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		char[] s = new char[len];
		int i = 0;
		int b = readByte();
		while(isPrintableChar(b)) {
			if (i == len) {
				throw new InputMismatchException();
			}
			s[i++] = (char) b;
			b = readByte();
		}
		return s;
	}
	public String nextLine() {
		if (!hasNextLine()) {
			throw new NoSuchElementException();
		}
		StringBuilder sb = new StringBuilder();
		int b = readByte();
		while(!isNewLine(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 char nextChar() {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		return (char) readByte();
	}
	public double nextDouble() { return Double.parseDouble(next());}
	public int[] nextIntArray(int n) { int[] a = new int[n]; for(int i=0;i<n;i++) a[i] = nextInt(); return a;}
	public long[] nextLongArray(int n) { long[] a = new long[n]; for(int i=0;i<n;i++) a[i] = nextLong(); return a;}
	public double[] nextDoubleArray(int n) { double[] a = new double[n]; for(int i=0;i<n;i++) a[i] = nextDouble(); return a;}
	public void nextIntArrays(int[]... a) { for(int i=0;i<a[0].length;i++) for(int j=0;j<a.length;j++) a[j][i] = nextInt();}
	public int[][] nextIntMatrix(int n,int m) { int[][] a = new int[n][]; for(int i=0;i<n;i++) a[i] = nextIntArray(m); return a;}
	public char[][] nextCharMap(int n,int m) { char[][] a = new char[n][]; for(int i=0;i<n;i++) a[i] = nextCharArray(m); return a;}
	public void close() { super.close(); try {in.close();} catch (IOException e) {}}
}

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