結果

問題 No.416 旅行会社
コンテスト
ユーザー hiromi_ayase
提出日時 2016-08-26 23:39:19
言語 Java
(openjdk 23)
結果
TLE  
実行時間 -
コード長 5,077 bytes
コンパイル時間 3,297 ms
コンパイル使用メモリ 87,656 KB
実行使用メモリ 68,884 KB
最終ジャッジ日時 2024-11-08 10:45:07
合計ジャッジ時間 13,629 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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ファイルパターン 結果
other TLE * 1 -- * 20
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 # 

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Set;

public class Main {
	private static final int C = 10000;

	public static void main(String[] args) {
		FastScanner sc = new FastScanner();
		int N = sc.nextInt();
		int M = sc.nextInt();
		int Q = sc.nextInt();

		UnionFind uf = new UnionFind(N);
		Set<Integer> set = new HashSet<>();
		for (int i = 0; i < M; i++) {
			int a = sc.nextInt() - 1;
			int b = sc.nextInt() - 1;

			set.add(a * C + b);
		}

		List<Integer> q = new ArrayList<>();
		for (int i = 0; i < Q; i++) {
			int a = sc.nextInt() - 1;
			int b = sc.nextInt() - 1;

			set.remove(a * C + b);
			q.add(a * C + b);
		}

		int[] ans = new int[N];

		for (int x : set) {
			int a = x / C;
			int b = x % C;
			uf.union(a, b);
		}

		Set<Integer> noRoute = new HashSet<>();
		for (int i = 0; i < N; i++) {
			if (uf.find(i) == uf.find(0)) {
				ans[i] = -1;
			} else {
				noRoute.add(i);
			}
		}

		Collections.reverse(q);
		int count = 0;
		for (int x : q) {
			int a = x / C;
			int b = x % C;

			if (uf.find(a) != uf.find(b)) {
				List<Integer> tmp = new ArrayList<>();
				if (uf.find(0) == uf.find(a)) {
					for (int y : noRoute) {
						if (uf.find(b) == uf.find(y)) {
							ans[y] = Q - count;
							tmp.add(y);
						}
					}
				}
				if (uf.find(0) == uf.find(b)) {
					for (int y : noRoute) {
						if (uf.find(a) == uf.find(y)) {
							ans[y] = Q - count;
							tmp.add(y);
						}
					}
				}
				for (int y : tmp) {
					noRoute.remove(y);
				}
				uf.union(a, b);
			}
			count++;
		}

		StringBuilder sb = new StringBuilder();
		for (int i = 1; i < N; i++) {
			sb.append(ans[i]);
			sb.append("\n");
		}
		System.out.println(sb);

	}

}

class UnionFind {
	private int[] table;
	private int[] rank;

	public UnionFind(int size) {
		this.table = new int[size];
		this.rank = new int[size];
		for (int i = 0; i < size; i++) {
			this.table[i] = i;
			this.rank[i] = 1;
		}
	}

	public boolean isSame(int node1, int node2) {
		return find(node1) == find(node2);
	}

	public int find(int node) {
		if (table[node] == node) {
			return node;
		} else {
			return table[node] = find(table[node]);
		}
	}

	public void union(int node1, int node2) {
		int root1 = find(node1);
		int root2 = find(node2);

		if (rank[root1] < rank[root2]) {
			table[root1] = root2;
		} else if (rank[root1] > rank[root2]) {
			table[root2] = root1;
		} else if (root1 != root2) {
			table[root2] = root1;
			rank[root1]++;
		}
	}
}

class FastScanner {
	public static String debug = null;

	private final InputStream in = System.in;
	private int ptr = 0;
	private int buflen = 0;
	private byte[] buffer = new byte[1024];
	private boolean eos = false;

	private boolean hasNextByte() {
		if (ptr < buflen) {
			return true;
		} else {
			ptr = 0;
			try {
				if (debug != null) {
					buflen = debug.length();
					buffer = debug.getBytes();
					debug = "";
					eos = true;
				} else {
					buflen = in.read(buffer);
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
			if (buflen < 0) {
				eos = true;
				return false;
			} else 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 void skipUnprintable() {
		while (hasNextByte() && !isPrintableChar(buffer[ptr]))
			ptr++;
	}

	public boolean isEOS() {
		return this.eos;
	}

	public boolean hasNext() {
		skipUnprintable();
		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();
		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() {
		return (int) nextLong();
	}

	public long[] nextLongList(int n) {
		return nextLongTable(1, n)[0];
	}

	public int[] nextIntList(int n) {
		return nextIntTable(1, n)[0];
	}

	public long[][] nextLongTable(int n, int m) {
		long[][] ret = new long[n][m];
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < m; j++) {
				ret[i][j] = nextLong();
			}
		}
		return ret;
	}

	public int[][] nextIntTable(int n, int m) {
		int[][] ret = new int[n][m];
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < m; j++) {
				ret[i][j] = nextInt();
			}
		}
		return ret;
	}
}
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