結果

問題 No.416 旅行会社
コンテスト
ユーザー 37zigen
提出日時 2016-08-24 19:19:26
言語 Java
(openjdk 23)
結果
AC  
実行時間 1,116 ms / 4,000 ms
コード長 5,105 bytes
コンパイル時間 7,459 ms
コンパイル使用メモリ 82,328 KB
実行使用メモリ 122,436 KB
最終ジャッジ日時 2024-12-14 19:43:22
合計ジャッジ時間 18,338 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge2
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ファイルパターン 結果
other AC * 21
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 No400番台;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;

public class Q416 {

	@SuppressWarnings("unchecked")
	void solver() {
		int N = ni();// the number of islands
		int M = ni();// the number of bridges
		int Q = ni();// the number of events
		ArrayList<Edge>[] g = new ArrayList[N];
		for (int i = 0; i < N; i++) {
			g[i] = new ArrayList<>();
		}
		ArrayList<Integer>[] ref = new ArrayList[N];
		for (int i = 0; i < N; i++) {
			ref[i] = new ArrayList<>();
		}
		int[] A = new int[M];
		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			A[i] = ni() - 1;
			B[i] = ni() - 1;
		}
		int[] C = new int[Q];
		int[] D = new int[Q];
		for (int i = 0; i < Q; i++) {
			C[i] = ni() - 1;
			D[i] = ni() - 1;
			ref[C[i]].add(D[i]);
			ref[D[i]].add(C[i]);
			g[C[i]].add(new Edge(C[i], D[i], i + 1));
			g[D[i]].add(new Edge(D[i], C[i], i + 1));
		}
		for (int i = 0; i < M; i++) {
			if (ref[A[i]].contains(B[i]))
				continue;
			g[A[i]].add(new Edge(A[i], B[i], Q + 1));
			g[B[i]].add(new Edge(B[i], A[i], Q + 1));
		}

		ArrayDeque<Integer> que = new ArrayDeque<>();
		ArrayDeque<Integer>[] pending = new ArrayDeque[Q + 1];
		for (int i = 0; i < Q + 1; i++)
			pending[i] = new ArrayDeque<>();
		que.add(0);
		int[] d = new int[N];
		boolean[] checked = new boolean[N];
		while (!que.isEmpty()) {
			int v = que.poll();
			d[v] = Q + 1;
			checked[v] = true;
			for (Edge e : g[v]) {
				if (checked[e.dst])
					continue;
				if (e.event_time == Q + 1) {
					que.add(e.dst);
				} else {
					pending[e.event_time].add(e.dst);
				}
			}
		}
		for (int i = Q; i >= 1; i--) {
			while (!pending[i].isEmpty()) {
				que.add(pending[i].poll());
				while (!que.isEmpty()) {
					int v = que.poll();
					if (checked[v])
						continue;
					d[v] = i;
					checked[v] = true;
					for (Edge e : g[v]) {
						if (checked[e.dst])
							continue;
						if (e.event_time >= i) {
							que.add(e.dst);
						} else {
							pending[e.event_time].add(e.dst);
						}
					}
				}
			}
		}
		for (int i = 1; i < N; i++) {
			if (d[i] == Q + 1) {
				out.println(-1);
			} else {
				out.println(d[i]);
			}
		}
	}

	void tr(Object... o) {
		System.out.println(Arrays.deepToString(o));
	}

	class Edge {
		int src;
		int dst;
		int event_time;

		Edge(int src, int dst, int event_time) {
			this.src = src;
			this.dst = dst;
			this.event_time = event_time;
		}
	}
	static InputStream is;
	static PrintWriter out;
	static String INPUT = "";


	public static void main(String[] args) throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);

		new Q416().solver();;
		out.flush();
	}

	static long nl()
	{
		try {
			long num = 0;
			boolean minus = false;
			while((num = is.read()) != -1 && !((num >= '0' && num <= '9') || num == '-'));
			if(num == '-'){
				num = 0;
				minus = true;
			}else{
				num -= '0';
			}

			while(true){
				int b = is.read();
				if(b >= '0' && b <= '9'){
					num = num * 10 + (b - '0');
				}else{
					return minus ? -num : num;
				}
			}
		} catch (IOException e) {
		}
		return -1;
	}

	static char nc()
	{
		try {
			int b = skip();
			if(b == -1)return 0;
			return (char)b;
		} catch (IOException e) {
		}
		return 0;
	}

	static double nd()
	{
		try {
			return Double.parseDouble(ns());
		}catch(Exception e) {
		}
		return 0;
	}

	static String ns()
	{
		try{
			int b = skip();
			StringBuilder sb = new StringBuilder();
			if(b == -1)return "";
			sb.append((char)b);
			while(true){
				b = is.read();
				if(b == -1)return sb.toString();
				if(b <= ' ')return sb.toString();
				sb.append((char)b);
			}
		} catch (IOException e) {
		}
		return "";
	}

	public static char[] ns(int n)
	{
		char[] buf = new char[n];
		try{
			int b = skip(), p = 0;
			if(b == -1)return null;
			buf[p++] = (char)b;
			while(p < n){
				b = is.read();
				if(b == -1 || b <= ' ')break;
				buf[p++] = (char)b;
			}
			return Arrays.copyOf(buf, p);
		} catch (IOException e) {
		}
		return null;
	}

	public static byte[] nse(int n)
	{
		byte[] buf = new byte[n];
		try{
			int b = skip();
			if(b == -1)return null;
			is.read(buf);
			return buf;
		} catch (IOException e) {
		}
		return null;
	}

	static int skip() throws IOException
	{
		int b;
		while((b = is.read()) != -1 && !(b >= 33 && b <= 126));
		return b;
	}

	static boolean eof()
	{
		try {
			is.mark(1000);
			int b = skip();
			is.reset();
			return b == -1;
		} catch (IOException e) {
			return true;
		}
	}

	static int ni()
	{
		try {
			int num = 0;
			boolean minus = false;
			while((num = is.read()) != -1 && !((num >= '0' && num <= '9') || num == '-'));
			if(num == '-'){
				num = 0;
				minus = true;
			}else{
				num -= '0';
			}

			while(true){
				int b = is.read();
				if(b >= '0' && b <= '9'){
					num = num * 10 + (b - '0');
				}else{
					return minus ? -num : num;
				}
			}
		} catch (IOException e) {
		}
		return -1;
	}

}
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