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답안 #417964

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417964 2021-06-04T17:07:57 Z temurbek_khujaev 경주 (Race) (IOI11_race) C++17
100 / 100
 1456 ms 49368 KB 
#include "race.h"
#include <bits/stdc++.h>

#define N 200200
using namespace std;

vector<pair<int, int> > g[N];
int d[N];
int p[N];

int get_centroid(int v, int parent, int n, int &centroid) {
    int size = 1;
    for (auto[x, y]:g[v]) {
        if (x != parent && d[x] == -1) {
            size += get_centroid(x, v, n, centroid);
        }
    }
    if (size * 2 >= n && centroid == -1) centroid = v;
    return size;
}

int K;
int ans = 1e9;

void get_compo_dists(int v, int dist, int len, int pass_limit, vector<pair<int, int> > &vec, int p = -1) {
    if (dist > K) return;
    vec.emplace_back(dist, len);
    for (auto[x, y]:g[v]) {
        if ((d[x] > pass_limit || d[x] == -1) && p != x) {
            get_compo_dists(x, dist + y, len + 1, pass_limit, vec, v);
        }
    }
}

void build(int v, int parent, int depth, int n) {
    int centroid = -1;
    get_centroid(v, -1, n, centroid);
    if (centroid == -1) centroid = v;
    d[centroid] = depth;
    p[centroid] = parent;
    map<int, int> dist;
    dist[0] = 0;

    for (auto[x, y]:g[centroid]) {
        if (d[x] == -1) {
            vector<pair<int, int>> vec;
            get_compo_dists(x, y, 1, d[centroid], vec);
            for (auto[distance, cost]: vec) {
                if (dist.count(K - distance)) {

                    ans = min(ans, cost + dist[K - distance]);
                }
            }

            for (auto[distance, cost]: vec) {
                if (dist.count(distance) == 0) {
                    dist[distance] = cost;
                } else dist[distance] = min(dist[distance], cost);
            }

            build(x, centroid, depth + 1, (n + 1) / 2);
        }


    }
//    cerr << "Centroid = " << centroid << endl;
//    for (auto[x, y]:dist) {
//        cerr << x << ' ' << y << endl;
//    }
}

int best_path(int n, int K, int H[][2], int L[]) {
    ::K = K;
    for (int i = 0; i < n - 1; i++) {
        g[H[i][0]].emplace_back(H[i][1], L[i]);
        g[H[i][1]].emplace_back(H[i][0], L[i]);
    }
    fill(d, d + N, -1);
    build(0, -1, 1, n);

    return (ans == 1e9 ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 4 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 4 ms 5712 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 5 ms 5708 KB Output is correct
7 Correct 4 ms 5708 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5816 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5708 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5812 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 4 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 4 ms 5712 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 5 ms 5708 KB Output is correct
7 Correct 4 ms 5708 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5816 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5708 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5812 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 4 ms 5708 KB Output is correct
21 Correct 5 ms 5876 KB Output is correct
22 Correct 4 ms 5836 KB Output is correct
23 Correct 5 ms 5836 KB Output is correct
24 Correct 5 ms 5836 KB Output is correct
25 Correct 6 ms 5836 KB Output is correct
26 Correct 5 ms 5800 KB Output is correct
27 Correct 5 ms 5836 KB Output is correct
28 Correct 7 ms 5836 KB Output is correct
29 Correct 6 ms 5836 KB Output is correct
30 Correct 6 ms 5836 KB Output is correct
31 Correct 5 ms 5836 KB Output is correct
32 Correct 6 ms 5836 KB Output is correct
33 Correct 6 ms 5836 KB Output is correct
34 Correct 5 ms 5836 KB Output is correct
35 Correct 5 ms 5836 KB Output is correct
36 Correct 5 ms 5896 KB Output is correct
37 Correct 6 ms 5912 KB Output is correct
38 Correct 6 ms 5836 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 4 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 4 ms 5712 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 5 ms 5708 KB Output is correct
7 Correct 4 ms 5708 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5816 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5708 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5812 KB Output is correct
19 Correct 330 ms 11232 KB Output is correct
20 Correct 321 ms 11196 KB Output is correct
21 Correct 369 ms 11584 KB Output is correct
22 Correct 322 ms 11784 KB Output is correct
23 Correct 135 ms 11240 KB Output is correct
24 Correct 97 ms 11192 KB Output is correct
25 Correct 166 ms 14740 KB Output is correct
26 Correct 128 ms 19096 KB Output is correct
27 Correct 323 ms 16504 KB Output is correct
28 Correct 307 ms 30816 KB Output is correct
29 Correct 380 ms 29620 KB Output is correct
30 Correct 299 ms 16520 KB Output is correct
31 Correct 278 ms 16460 KB Output is correct
32 Correct 420 ms 16572 KB Output is correct
33 Correct 406 ms 15556 KB Output is correct
34 Correct 324 ms 15292 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 4 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 4 ms 5712 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 5 ms 5708 KB Output is correct
7 Correct 4 ms 5708 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5816 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5708 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5812 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 4 ms 5708 KB Output is correct
21 Correct 5 ms 5876 KB Output is correct
22 Correct 4 ms 5836 KB Output is correct
23 Correct 5 ms 5836 KB Output is correct
24 Correct 5 ms 5836 KB Output is correct
25 Correct 6 ms 5836 KB Output is correct
26 Correct 5 ms 5800 KB Output is correct
27 Correct 5 ms 5836 KB Output is correct
28 Correct 7 ms 5836 KB Output is correct
29 Correct 6 ms 5836 KB Output is correct
30 Correct 6 ms 5836 KB Output is correct
31 Correct 5 ms 5836 KB Output is correct
32 Correct 6 ms 5836 KB Output is correct
33 Correct 6 ms 5836 KB Output is correct
34 Correct 5 ms 5836 KB Output is correct
35 Correct 5 ms 5836 KB Output is correct
36 Correct 5 ms 5896 KB Output is correct
37 Correct 6 ms 5912 KB Output is correct
38 Correct 6 ms 5836 KB Output is correct
39 Correct 330 ms 11232 KB Output is correct
40 Correct 321 ms 11196 KB Output is correct
41 Correct 369 ms 11584 KB Output is correct
42 Correct 322 ms 11784 KB Output is correct
43 Correct 135 ms 11240 KB Output is correct
44 Correct 97 ms 11192 KB Output is correct
45 Correct 166 ms 14740 KB Output is correct
46 Correct 128 ms 19096 KB Output is correct
47 Correct 323 ms 16504 KB Output is correct
48 Correct 307 ms 30816 KB Output is correct
49 Correct 380 ms 29620 KB Output is correct
50 Correct 299 ms 16520 KB Output is correct
51 Correct 278 ms 16460 KB Output is correct
52 Correct 420 ms 16572 KB Output is correct
53 Correct 406 ms 15556 KB Output is correct
54 Correct 324 ms 15292 KB Output is correct
55 Correct 27 ms 6604 KB Output is correct
56 Correct 22 ms 6444 KB Output is correct
57 Correct 171 ms 11764 KB Output is correct
58 Correct 61 ms 11280 KB Output is correct
59 Correct 385 ms 26364 KB Output is correct
60 Correct 1179 ms 49368 KB Output is correct
61 Correct 472 ms 16804 KB Output is correct
62 Correct 640 ms 16888 KB Output is correct
63 Correct 775 ms 17080 KB Output is correct
64 Correct 1456 ms 27668 KB Output is correct
65 Correct 400 ms 16340 KB Output is correct
66 Correct 763 ms 28480 KB Output is correct
67 Correct 202 ms 16716 KB Output is correct
68 Correct 914 ms 20900 KB Output is correct
69 Correct 902 ms 20568 KB Output is correct
70 Correct 890 ms 19964 KB Output is correct