結果

問題 No.277 根掘り葉掘り
ユーザー tanzaku
提出日時 2015-09-04 22:43:26
言語 Java8
(openjdk 1.8.0.181)
結果
AC  
実行時間 148 ms
コード長 6,659 Byte
コンパイル時間 2,561 ms
使用メモリ 35,896 KB
最終ジャッジ日時 2018-09-22 22:27:27

テストケース

テストケース表示
入力 結果 実行時間
使用メモリ
1_sample_00.txt AC 73 ms
24,336 KB
1_sample_01.txt AC 75 ms
21,876 KB
2_small_00.txt AC 75 ms
24,336 KB
2_small_01.txt AC 75 ms
24,428 KB
2_small_02.txt AC 75 ms
24,332 KB
2_small_03.txt AC 75 ms
24,332 KB
2_small_04.txt AC 78 ms
25,128 KB
2_small_05.txt AC 80 ms
24,796 KB
2_small_06.txt AC 78 ms
24,332 KB
3_large_00.txt AC 147 ms
34,288 KB
3_large_01.txt AC 133 ms
33,940 KB
3_large_02.txt AC 145 ms
33,652 KB
3_large_03.txt AC 145 ms
35,356 KB
3_large_04.txt AC 148 ms
34,744 KB
4_rand_00.txt AC 144 ms
31,920 KB
4_rand_01.txt AC 143 ms
31,172 KB
4_rand_02.txt AC 144 ms
35,104 KB
4_rand_03.txt AC 143 ms
33,652 KB
4_rand_04.txt AC 145 ms
35,896 KB
4_rand_05.txt AC 144 ms
35,364 KB
テストケース一括ダウンロード

ソースコード

diff #
import java.io.*;
import java.math.*;
import java.util.*;

import static java.util.Arrays.*;

public class MainStack implements Runnable {
	private static final int mod = (int)1e9+7;

	final Random random = new Random(0);
	final IOFast io = new IOFast();

	/// MAIN CODE
	@Override
	public void run() {
		try {
			runMain();
		}
		catch(Exception e) {
			
		}
	}

	public void runMain() throws IOException {
//		int TEST_CASE = Integer.parseInt(new String(io.nextLine()).trim());
		int TEST_CASE = 1;
		while(TEST_CASE-- != 0) {
			int n = io.nextInt();
			SimpleAdjListGraph g = new SimpleAdjListGraph(n, 2*n);
			int[] deg = new int[n];
			for(int i = 0; i < n - 1; i++) {
				int x = io.nextInt() - 1;
				int y = io.nextInt() - 1;
				g.addEdge(x, y);
				g.addEdge(y, x);
				deg[x]++;
				deg[y]++;
			}
			int[] q = new int[2*n];
			boolean[] vis = new boolean[n];
			int s = 0, t = 0;
			for(int i = 0; i < n; i++) {
				if(deg[i] == 1 || i == 0) {
					q[t++] = i;
					vis[i] = true;
				}
			}

			int[] ans = new int[n];
			while(s != t) {
				int v = q[s++];

				for(int e = g.head[v]; e != -1; e = g.next[e]) {
					if(!vis[g.to[e]]) {
						vis[g.to[e]] = true;
						q[t++] = g.to[e];
						ans[g.to[e]] = ans[v] + 1;
					}
				}

			}
			for(int v : ans) io.out.println(v);
		}
		io.out.flush();
	}
	
	static
	class SimpleAdjListGraph {
		int m, V, E;
		int[] head, next, to;

		public SimpleAdjListGraph(int V, int E) {
			head = new int[V];
			next = new int[E];
			to = new int[E];
			this.V = V;
			this.E = E;
			clear();
		}

		public void clear() {
			m = 0;
			Arrays.fill(head, -1);
		}

		public void addEdge(int s, int t) {
			next[m] = head[s];
			head[s] = m;
			to[m++] = t;
		}
	}


	/// TEMPLATE
	static int gcd(int n, int r) { return r == 0 ? n : gcd(r, n%r); }
	static long gcd(long n, long r) { return r == 0 ? n : gcd(r, n%r); }
	
	static <T> void swap(T[] x, int i, int j) { T t = x[i]; x[i] = x[j]; x[j] = t; }
	static void swap(int[] x, int i, int j) { int t = x[i]; x[i] = x[j]; x[j] = t; }
	
	void main() throws IOException {
		//		IOFast.setFileIO("rle-size.in", "rle-size.out");
      Thread thread = new Thread(null, this, "0", 1<<25);
      thread.start();
      try {
		thread.join();
	} catch (InterruptedException e1) {
		// TODO Auto-generated catch block
		e1.printStackTrace();
	}
//		try { run(); }
//		catch (EndOfFileRuntimeException e) { }
		io.out.flush();
	}
	public static void main(String[] args) throws IOException { new MainStack().main(); }
	
	static class EndOfFileRuntimeException extends RuntimeException {
		private static final long serialVersionUID = -8565341110209207657L; }

	static
	public class IOFast {
		private BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		private PrintWriter out = new PrintWriter(System.out);

		void setFileIn(String ins) throws IOException { in.close(); in = new BufferedReader(new FileReader(ins)); }
		void setFileOut(String outs) throws IOException { out.flush(); out.close(); out = new PrintWriter(new FileWriter(outs)); }
		void setFileIO(String ins, String outs) throws IOException { setFileIn(ins); setFileOut(outs); }

		private static int pos, readLen;
		private static final char[] buffer = new char[1024 * 8];
		private static char[] str = new char[500*8*2];
		private static boolean[] isDigit = new boolean[256];
		private static boolean[] isSpace = new boolean[256];
		private static boolean[] isLineSep = new boolean[256];

		static { for(int i = 0; i < 10; i++) { isDigit['0' + i] = true; } isDigit['-'] = true; isSpace[' '] = isSpace['\r'] = isSpace['\n'] = isSpace['\t'] = true; isLineSep['\r'] = isLineSep['\n'] = true; }
		public int read() throws IOException { if(pos >= readLen) { pos = 0; readLen = in.read(buffer); if(readLen <= 0) { throw new EndOfFileRuntimeException(); } } return buffer[pos++]; }
		public int nextInt() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isSpace); int i = 0; int ret = 0; if(str[0] == '-') { i = 1; } for(; i < len; i++) ret = ret * 10 + str[i] - '0'; if(str[0] == '-') { ret = -ret; } return ret; }
		public long nextLong() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isSpace); int i = 0; long ret = 0; if(str[0] == '-') { i = 1; } for(; i < len; i++) ret = ret * 10 + str[i] - '0'; if(str[0] == '-') { ret = -ret; } return ret; }
		public char nextChar() throws IOException { while(true) { final int c = read(); if(!isSpace[c]) { return (char)c; } } }
		int reads(int len, boolean[] accept) throws IOException { try { while(true) { final int c = read(); if(accept[c]) { break; } if(str.length == len) { char[] rep = new char[str.length * 3 / 2]; System.arraycopy(str, 0, rep, 0, str.length); str = rep; } str[len++] = (char)c; } } catch(EndOfFileRuntimeException e) { ; } return len; }
		int reads(char[] cs, int len, boolean[] accept) throws IOException { try { while(true) { final int c = read(); if(accept[c]) { break; } cs[len++] = (char)c; } } catch(EndOfFileRuntimeException e) { ; } return len; }
		public char[] nextLine() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isLineSep); try { if(str[len-1] == '\r') { len--; read(); } } catch(EndOfFileRuntimeException e) { ; } return Arrays.copyOf(str, len); }
		public String nextString() throws IOException { return new String(next()); }
		public char[] next() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isSpace); return Arrays.copyOf(str, len); }
		public int next(char[] cs) throws IOException { int len = 0; cs[len++] = nextChar(); len = reads(cs, len, isSpace); return len; }
		public double nextDouble() throws IOException { return Double.parseDouble(nextString()); }
		public long[] nextLongArray(final int n) throws IOException { final long[] res = new long[n]; for(int i = 0; i < n; i++) { res[i] = nextLong(); } return res; }
		public int[] nextIntArray(final int n) throws IOException { final int[] res = new int[n]; for(int i = 0; i < n; i++) { res[i] = nextInt(); } return res; }
		public int[][] nextIntArray2D(final int n, final int k) throws IOException { final int[][] res = new int[n][]; for(int i = 0; i < n; i++) { res[i] = nextIntArray(k); } return res; }
		public int[][] nextIntArray2DWithIndex(final int n, final int k) throws IOException { final int[][] res = new int[n][k+1]; for(int i = 0; i < n; i++) { for(int j = 0; j < k; j++) { res[i][j] = nextInt(); } res[i][k] = i; } return res; }
		public double[] nextDoubleArray(final int n) throws IOException { final double[] res = new double[n]; for(int i = 0; i < n; i++) { res[i] = nextDouble(); } return res; }
	}
}
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