結果

問題 No.1442 I-wate Shortest Path Problem
ユーザー tentententen
提出日時 2021-03-31 10:57:05
言語 Java21
(openjdk 21)
結果
TLE  
(最新)
AC  
(最初)
実行時間 -
コード長 3,915 bytes
コンパイル時間 2,881 ms
コンパイル使用メモリ 84,884 KB
実行使用メモリ 162,204 KB
最終ジャッジ日時 2024-05-08 10:35:19
合計ジャッジ時間 29,588 ms
ジャッジサーバーID
(参考情報)
judge2 / judge3
このコードへのチャレンジ
(要ログイン)

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 53 ms
42,448 KB
testcase_01 AC 54 ms
37,172 KB
testcase_02 AC 271 ms
46,824 KB
testcase_03 AC 517 ms
52,084 KB
testcase_04 AC 248 ms
45,852 KB
testcase_05 AC 177 ms
43,260 KB
testcase_06 AC 461 ms
50,604 KB
testcase_07 AC 227 ms
43,788 KB
testcase_08 AC 562 ms
48,932 KB
testcase_09 AC 374 ms
50,508 KB
testcase_10 AC 584 ms
58,340 KB
testcase_11 AC 492 ms
49,996 KB
testcase_12 TLE -
testcase_13 AC 1,255 ms
100,768 KB
testcase_14 AC 2,216 ms
116,888 KB
testcase_15 AC 1,958 ms
109,472 KB
testcase_16 AC 2,381 ms
115,920 KB
testcase_17 TLE -
testcase_18 TLE -
testcase_19 AC 2,854 ms
130,884 KB
testcase_20 TLE -
testcase_21 TLE -
testcase_22 AC 1,249 ms
147,184 KB
testcase_23 TLE -
testcase_24 AC 1,128 ms
119,328 KB
testcase_25 AC 2,743 ms
144,232 KB
testcase_26 AC 1,664 ms
136,296 KB
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ソースコード

diff #

import java.util.*;
import java.io.*;

public class Main {
    static ArrayList<HashMap<Integer, Integer>> graph = new ArrayList<>();
    static int[] depths;
    static int[][] parents;
    static long[] totals;
	public static void main (String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] first = br.readLine().split(" ", 2);
		int n = Integer.parseInt(first[0]);
		int k = Integer.parseInt(first[1]);
		for (int i = 0; i < n + k; i++) {
		    graph.add(new HashMap<>());
		}
		for (int i = 0; i < n - 1; i++) {
		    String[] line = br.readLine().split(" ", 3);
		    int a = Integer.parseInt(line[0]) - 1;
		    int b = Integer.parseInt(line[1]) - 1;
		    int c = Integer.parseInt(line[2]);
		    graph.get(a).put(b, c);
		    graph.get(b).put(a, c);
		}
		depths = new int[n];
		parents = new int[18][n];
		totals = new long[n];
		setDepth(0, 0, 0, 0);
		for (int i = 1; i < 18; i++) {
		    for (int j = 0; j < n; j++) {
		        parents[i][j] = parents[i - 1][parents[i - 1][j]];
		    }
		}
		int[] prices = new int[k];
		for (int i = 0; i < k; i++) {
		    String[] line = br.readLine().split(" ", 2);
		    int m = Integer.parseInt(line[0]);
		    int p = Integer.parseInt(line[1]);
		    prices[i] = p;
		    String[] ports = br.readLine().split(" ", m);
		    for (int j = 0; j < m; j++) {
		        int x = Integer.parseInt(ports[j]) - 1;
		        graph.get(x).put(n + i, p);
		        graph.get(n + i).put(x, 0);
		    }
		}
		PriorityQueue<Path> queue = new PriorityQueue<>();
		long[][] costs = new long[k][n + k];
		for (int i = 0; i < k; i++) {
		    Arrays.fill(costs[i], Long.MAX_VALUE);
		    queue.add(new Path(n + i, 0));
		    while (queue.size() > 0) {
		        Path p = queue.poll();
		        if (costs[i][p.idx] <= p.value) {
		            continue;
		        }
		        costs[i][p.idx] = p.value;
		        for (int x : graph.get(p.idx).keySet()) {
		            queue.add(new Path(x, p.value + graph.get(p.idx).get(x)));
		        }
		    }
		}
		int q = Integer.parseInt(br.readLine());
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < q; i++) {
		    String[] line = br.readLine().split(" ", 2);
		    int left = Integer.parseInt(line[0]) - 1;
		    int right = Integer.parseInt(line[1]) - 1;
		    int lca = getLCA(left, right);
		    long ans = totals[left] + totals[right] - totals[lca] * 2;
		    for (int j = 0; j < k; j++) {
		        long tmp = costs[j][left] + costs[j][right] + prices[j];
		        ans = Math.min(ans, tmp);
		    }
		    sb.append(ans).append("\n");
		}
		System.out.print(sb);
	}
	
	static int getLCA(int left, int right) {
	    if (depths[left] < depths[right]) {
	        return getLCA(right, left);
	    }
	    for (int i = 17; i >= 0; i--) {
	        if (depths[left] - depths[right] >= (1 << i)) {
	            left = parents[i][left];
	        }
	    }
	    if (left == right) {
	        return left;
	    }
	    for (int i = 17; i >= 0; i--) {
	        if (parents[i][left] != parents[i][right]) {
	            left = parents[i][left];
	            right = parents[i][right];
	        }
	    }
	    return parents[0][left];
	}
	
	static void setDepth(int idx, int p, int d, long c) {
	    depths[idx] = d;
	    parents[0][idx] = p;
	    totals[idx] = c;
	    for (int x : graph.get(idx).keySet()) {
	        if (x == p) {
	            continue;
	        }
	        setDepth(x, idx, d + 1, c + graph.get(idx).get(x));
	    }
	}
	
	static class Path implements Comparable<Path> {
	    int idx;
	    long value;
	    
	    public Path(int idx, long value) {
	        this.idx = idx;
	        this.value = value;
	    }
	    
	    public int compareTo(Path another) {
	        if (value == another.value) {
	            return 0;
	        } else if (value < another.value) {
	            return -1;
	        } else {
	            return 1;
	        }
	    }
	}
}
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