oj.uz

답안 #875942

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
875942 2023-11-20T20:11:26 Z MDSPro 경주 (Race) (IOI11_race) C++17
100 / 100
 640 ms 52120 KB 
#include "race.h"
#include <vector>
#include <map>

using namespace std;

int K;
const int INF = 1e9;
vector<vector<pair<int, int>>> g;
vector<int> sz, vis;

int get_centroid(int root) {
    auto sub_size = [&](auto sub_size, int x, int p) -> void {
        sz[x] = 1; 
        for(auto [z, w]: g[x]) {
            if(z != p && vis[z] == 0) {
                sub_size(sub_size, z, x);
                sz[x] += sz[z];
            }
        }
    };

    sub_size(sub_size, root, -1);
    int n = sz[root];
    
    auto dfs = [&](auto dfs, int x, int p) -> int {
        for(auto [z, w]: g[x]) {
            if(z != p && vis[z] == 0) {
                if(2 * sz[z] > n) return dfs(dfs, z, x); 
            }
        }

        return x;
    };

    return dfs(dfs, root, -1);
}

int get(int c) {
    c = get_centroid(c);

    int ans = INF;

    map<int, int> mp;
    mp[0] = 0;

    vector<pair<int, int>> collect;
    auto dfs = [&](auto dfs, int x, int p, int s, int dep) -> void {
        if(s > K) return;
        if(mp.count(K - s)) ans = min(ans, mp[K - s] + dep);
        collect.emplace_back(s, dep);

        for(auto [z, w]: g[x]) {
            if(z != p && vis[z] == 0) {
                dfs(dfs, z, x, s + w, dep + 1);
            }
        }
    };
    
    for(auto [z, w]: g[c]) {
        if(vis[z] == 0) {
            collect.clear();
            dfs(dfs, z, c, w, 1);
            
            for(auto [s, dep]: collect) {
                if(!mp.count(s) || mp[s] > dep) {
                    mp[s] = dep;
                }
            }
        }
    }

    vis[c] = 1;
    for(auto [z, w]: g[c]) {
        if(vis[z] == 0) {
            ans = min(ans, get(z));
        }
    }

    return ans;
}

int best_path(int N, int K, int H[][2], int L[]) {
    ::K = K;
    g.resize(N);
    sz.resize(N);
    vis.resize(N);

    for(int i = 0; i < N - 1; ++i) {
        int x = H[i][0], y = H[i][1], w = L[i];
        g[x].emplace_back(y, w);
        g[y].emplace_back(x, w);
    }

    int ans = get(0);
    
    if(ans == INF) return -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2480 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 0 ms 2472 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2480 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 0 ms 2472 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 0 ms 2468 KB Output is correct
21 Correct 2 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 2 ms 2892 KB Output is correct
25 Correct 2 ms 2648 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 2 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 2 ms 2396 KB Output is correct
30 Correct 2 ms 2492 KB Output is correct
31 Correct 2 ms 2648 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 2 ms 2652 KB Output is correct
34 Correct 2 ms 2392 KB Output is correct
35 Correct 1 ms 2584 KB Output is correct
36 Correct 1 ms 2392 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 2 ms 2652 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2480 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 0 ms 2472 KB Output is correct
19 Correct 135 ms 11000 KB Output is correct
20 Correct 132 ms 11164 KB Output is correct
21 Correct 137 ms 11424 KB Output is correct
22 Correct 127 ms 11728 KB Output is correct
23 Correct 58 ms 11352 KB Output is correct
24 Correct 53 ms 11088 KB Output is correct
25 Correct 95 ms 12704 KB Output is correct
26 Correct 74 ms 17628 KB Output is correct
27 Correct 150 ms 22004 KB Output is correct
28 Correct 165 ms 28756 KB Output is correct
29 Correct 154 ms 28304 KB Output is correct
30 Correct 131 ms 21840 KB Output is correct
31 Correct 130 ms 21908 KB Output is correct
32 Correct 172 ms 22084 KB Output is correct
33 Correct 179 ms 20816 KB Output is correct
34 Correct 116 ms 21680 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2480 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 0 ms 2472 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 0 ms 2468 KB Output is correct
21 Correct 2 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 2 ms 2892 KB Output is correct
25 Correct 2 ms 2648 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 2 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 2 ms 2396 KB Output is correct
30 Correct 2 ms 2492 KB Output is correct
31 Correct 2 ms 2648 KB Output is correct
32 Correct 2 ms 2652 KB Output is correct
33 Correct 2 ms 2652 KB Output is correct
34 Correct 2 ms 2392 KB Output is correct
35 Correct 1 ms 2584 KB Output is correct
36 Correct 1 ms 2392 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 2 ms 2652 KB Output is correct
39 Correct 135 ms 11000 KB Output is correct
40 Correct 132 ms 11164 KB Output is correct
41 Correct 137 ms 11424 KB Output is correct
42 Correct 127 ms 11728 KB Output is correct
43 Correct 58 ms 11352 KB Output is correct
44 Correct 53 ms 11088 KB Output is correct
45 Correct 95 ms 12704 KB Output is correct
46 Correct 74 ms 17628 KB Output is correct
47 Correct 150 ms 22004 KB Output is correct
48 Correct 165 ms 28756 KB Output is correct
49 Correct 154 ms 28304 KB Output is correct
50 Correct 131 ms 21840 KB Output is correct
51 Correct 130 ms 21908 KB Output is correct
52 Correct 172 ms 22084 KB Output is correct
53 Correct 179 ms 20816 KB Output is correct
54 Correct 116 ms 21680 KB Output is correct
55 Correct 14 ms 3676 KB Output is correct
56 Correct 10 ms 3420 KB Output is correct
57 Correct 110 ms 11908 KB Output is correct
58 Correct 36 ms 10952 KB Output is correct
59 Correct 237 ms 24524 KB Output is correct
60 Correct 636 ms 52120 KB Output is correct
61 Correct 198 ms 22416 KB Output is correct
62 Correct 228 ms 22208 KB Output is correct
63 Correct 225 ms 22344 KB Output is correct
64 Correct 640 ms 35056 KB Output is correct
65 Correct 152 ms 22916 KB Output is correct
66 Correct 419 ms 28604 KB Output is correct
67 Correct 83 ms 22724 KB Output is correct
68 Correct 269 ms 29824 KB Output is correct
69 Correct 267 ms 29976 KB Output is correct
70 Correct 257 ms 28680 KB Output is correct