結果

問題 No.1023 Cyclic Tour
ユーザー uwiuwi
提出日時 2020-04-10 22:20:45
言語 Java21
(openjdk 21)
結果
WA  
実行時間 -
コード長 5,033 bytes
コンパイル時間 3,876 ms
コンパイル使用メモリ 86,696 KB
実行使用メモリ 60,972 KB
最終ジャッジ日時 2024-09-15 20:51:43
合計ジャッジ時間 21,070 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
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 49 ms
36,928 KB
testcase_01 AC 49 ms
36,876 KB
testcase_02 AC 50 ms
36,568 KB
testcase_03 AC 50 ms
37,012 KB
testcase_04 AC 206 ms
51,348 KB
testcase_05 AC 213 ms
51,332 KB
testcase_06 AC 309 ms
56,704 KB
testcase_07 AC 272 ms
52,628 KB
testcase_08 AC 202 ms
51,216 KB
testcase_09 AC 198 ms
51,228 KB
testcase_10 AC 191 ms
51,352 KB
testcase_11 AC 277 ms
52,604 KB
testcase_12 AC 179 ms
51,168 KB
testcase_13 AC 165 ms
46,808 KB
testcase_14 AC 165 ms
46,668 KB
testcase_15 AC 178 ms
50,896 KB
testcase_16 AC 298 ms
55,976 KB
testcase_17 AC 309 ms
55,908 KB
testcase_18 AC 290 ms
55,848 KB
testcase_19 AC 279 ms
56,072 KB
testcase_20 AC 293 ms
56,048 KB
testcase_21 AC 305 ms
56,316 KB
testcase_22 AC 304 ms
56,192 KB
testcase_23 AC 303 ms
56,020 KB
testcase_24 AC 321 ms
56,228 KB
testcase_25 AC 317 ms
56,024 KB
testcase_26 AC 328 ms
56,608 KB
testcase_27 WA -
testcase_28 AC 314 ms
55,824 KB
testcase_29 AC 315 ms
55,904 KB
testcase_30 AC 329 ms
56,260 KB
testcase_31 AC 328 ms
56,392 KB
testcase_32 AC 334 ms
60,472 KB
testcase_33 AC 344 ms
57,088 KB
testcase_34 AC 325 ms
56,040 KB
testcase_35 AC 312 ms
56,512 KB
testcase_36 AC 297 ms
55,936 KB
testcase_37 AC 348 ms
58,728 KB
testcase_38 AC 289 ms
57,596 KB
testcase_39 AC 319 ms
56,004 KB
testcase_40 AC 329 ms
55,812 KB
testcase_41 WA -
testcase_42 AC 324 ms
56,396 KB
testcase_43 AC 328 ms
55,588 KB
testcase_44 AC 229 ms
51,340 KB
testcase_45 AC 422 ms
60,972 KB
testcase_46 AC 190 ms
59,592 KB
testcase_47 AC 698 ms
58,172 KB
testcase_48 AC 308 ms
56,420 KB
testcase_49 AC 315 ms
56,796 KB
testcase_50 AC 308 ms
56,580 KB
testcase_51 WA -
testcase_52 WA -
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 contest200410;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class D {
	InputStream is;
	PrintWriter out;
//	String INPUT = "3 4 1 2 2 2 3 2 3 2 2 2 1 2";
	String INPUT = "";
	
	// 1-3
	//  /^
	// 2>4
	
	// 1-2
	// ^/^
	// 3-4
	
	void solve()
	{
		int n =ni(), m = ni();
		int[] from = new int[2*m];
		int[] to = new int[2*m];
		int[] ws = new int[2*m];
		int p = 0;
		for(int i = 0;i < m;i++){
			int x = ni()-1, y = ni()-1, c = ni();
			from[p] = x; to[p] = y; ws[p] = c;p++;
			if(c == 1){
				from[p] = y; to[p] = x; ws[p] = c;p++;
			}
		}
		int[][][] g = packWD(n, from, to, ws, p);
		boolean ans = false;
		boolean[] ved = new boolean[n];
		boolean[] aed = new boolean[n];
		for(int i = 0;i < n;i++){
			ans |= dfs(i, -1, 0, g, ved, aed);
		}
		out.println(ans ? "Yes" : "No");
	}
	
	public static int[][][] packWD(int n, int[] from, int[] to, int[] w){ return packWD(n, from, to, w, from.length); }
	public static int[][][] packWD(int n, int[] from, int[] to, int[] w, int sup)
	{
		int[][][] g = new int[n][][];
		int[] p = new int[n];
		for(int i = 0;i < sup;i++)p[from[i]]++;
		for(int i = 0;i < n;i++)g[i] = new int[p[i]][2];
		for(int i = 0;i < sup;i++){
			--p[from[i]];
			g[from[i]][p[from[i]]][0] = to[i];
			g[from[i]][p[from[i]]][1] = w[i];
		}
		return g;
	}
	
	private static boolean dfs(int cur, int pre, int come, int[][][] g, boolean[] ved, boolean[] aed)
	{
		ved[cur] = true;
		int z = 0;
		for(int[] nex : g[cur]){
			if(aed[nex[0]])continue;
			if(nex[0] == pre){
				z++;
			}else if(ved[nex[0]]){
				return true;
			}
			if(!ved[nex[0]]){
				if(dfs(nex[0], cur, nex[1], g, ved, aed))return true;
			}
		}
		aed[cur] = true;
		if(z > 0){
			if(come == 1){
				return z-1 > 0;
			}else{
				return true;
			}
		}
		
		return false;
	}


	public static int[][] packD(int n, int[] from, int[] to){ return packD(n, from, to, from.length);}
	public static int[][] packD(int n, int[] from, int[] to, int sup)
	{
		int[][] g = new int[n][];
		int[] p = new int[n];
		for(int i = 0;i < sup;i++)p[from[i]]++;
		for(int i = 0;i < n;i++)g[i] = new int[p[i]];
		for(int i = 0;i < sup;i++){
			g[from[i]][--p[from[i]]] = to[i];
		}
		return g;
	}

	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
//			@Override
//			public void run() {
//				long s = System.currentTimeMillis();
//				solve();
//				out.flush();
//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//			}
//		};
//		t.start();
//		t.join();
	}
	
	public static void main(String[] args) throws Exception { new D().run(); }
	
	private byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}
	
	private char[][] nm(int n, int m) {
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}
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