結果

問題 No.416 旅行会社
ユーザー hiromi_ayasehiromi_ayase
提出日時 2016-08-27 00:41:11
言語 Java21
(openjdk 21)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 5,328 bytes
コンパイル時間 2,545 ms
コンパイル使用メモリ 79,964 KB
実行使用メモリ 93,516 KB
最終ジャッジ日時 2024-04-26 05:07:08
合計ジャッジ時間 13,693 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 WA -
testcase_01 WA -
testcase_02 WA -
testcase_03 WA -
testcase_04 WA -
testcase_05 WA -
testcase_06 WA -
testcase_07 WA -
testcase_08 WA -
testcase_09 WA -
testcase_10 WA -
testcase_11 WA -
testcase_12 WA -
testcase_13 WA -
testcase_14 WA -
testcase_15 WA -
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
testcase_19 WA -
testcase_20 WA -
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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 = 100000;

	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<Long> set = new HashSet<>();
		for (int i = 0; i < M; i++) {
			long a = sc.nextInt() - 1;
			long b = sc.nextInt() - 1;

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

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

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

		int[] ans = new int[N];

		List<List<Integer>> v = new ArrayList<>();
		for (int i = 0; i < N; i++) {
			v.add(new ArrayList<Integer>());
		}

		for (long x : set) {
			int a = (int) (x / C);
			int b = (int) (x % C);

			uf.union(a, b);
		}

		for (int i = 0; i < N; i++) {
			int root = uf.find(i);
			if (uf.find(i) == uf.find(0)) {
				ans[i] = -1;
			}
			v.get(root).add(i);
		}

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

			int rootA = uf.find(a);
			int rootB = uf.find(b);
			if (rootA != rootB) {
				int root0 = uf.find(0);
				if (root0 == rootA) {
					int root = rootB;
					for (int y : v.get(root)) {
						ans[y] = Q - count;
					}
				} else if (root0 == rootB) {
					int root = rootA;
					for (int y : v.get(root)) {
						ans[y] = Q - count;
					}
				}

				List<Integer> la = v.get(rootA);
				List<Integer> lb = v.get(rootB);

				if (la.size() < lb.size()) {
					List<Integer> tmp = la;
					la = lb;
					lb = tmp;
				}

				for (int y : lb) {
					la.add(y);
				}
				uf.union(a, b);
				v.set(uf.find(a), la);
			}
			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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