oj.uz

답안 #957845

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
957845 2024-04-04T11:50:20 Z MisterReaper 경주 (Race) (IOI11_race) C++17
100 / 100
 489 ms 103940 KB 
#include <bits/stdc++.h>
#include <race.h>
using i64 = long long;

constexpr int maxN = 2E5 + 5;

int n, k;
std::map<i64, int> s[maxN];
std::vector<std::pair<int, int>> adj[maxN];
int h[maxN], d[maxN];
int ans = maxN;

void dfs(int node, int par) {
    for(auto [child, w] : adj[node]) {
        if(child == par) {
            continue;
        }
        h[child] = h[node] + w;
        d[child] = d[node] + 1;
        dfs(child, node);
    }
    return;
}

void s2l(int node, int par) {
    i64 target = k + h[node] * 2;
    s[node][h[node]] = d[node];
    for(auto [child, w] : adj[node]) {
        if(child == par) {
            continue;
        }
        s2l(child, node);
        if(s[child].size() > s[node].size()) {
            std::swap(s[child], s[node]);
        }

        for(auto [a, b] : s[child]) {
            if(s[node].count(target - a)) {
                ans = std::min(ans, s[node][target - a] + b - 2 * d[node]);
            }
        }

        for(auto [a, b] : s[child]) {
            if(!s[node].count(a)) {
                s[node][a] = n;
            }
            s[node][a] = std::min(s[node][a], b);
        }
    }

    /*
    std::cerr << "node: " << node << "\n";
    for(auto [a, b] : s[node]) {
        std::cerr << a << " " << b << "\n";
    }
    */
}

int best_path(int N, int K, int H[][2], int L[]) {
    n = N;
    k = K;
    for(int i = 0; i < n - 1; i++) {
        //std::cerr << H[i][0] << " " << H[i][1] << " :: " << L[i] << "\n";
        adj[H[i][0]].emplace_back(H[i][1], L[i]);
        adj[H[i][1]].emplace_back(H[i][0], L[i]);
    }

    dfs(0, -1);
    s2l(0, -1);

    if(ans == maxN) {
        ans = -1;
    }
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 19544 KB Output is correct
2 Correct 4 ms 19548 KB Output is correct
3 Correct 5 ms 19544 KB Output is correct
4 Correct 4 ms 19548 KB Output is correct
5 Correct 5 ms 19548 KB Output is correct
6 Correct 5 ms 19548 KB Output is correct
7 Correct 4 ms 19548 KB Output is correct
8 Correct 4 ms 19548 KB Output is correct
9 Correct 4 ms 19548 KB Output is correct
10 Correct 4 ms 19548 KB Output is correct
11 Correct 5 ms 19544 KB Output is correct
12 Correct 4 ms 19548 KB Output is correct
13 Correct 4 ms 19724 KB Output is correct
14 Correct 4 ms 19548 KB Output is correct
15 Correct 4 ms 19548 KB Output is correct
16 Correct 5 ms 19548 KB Output is correct
17 Correct 5 ms 19548 KB Output is correct
18 Correct 4 ms 19736 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 19544 KB Output is correct
2 Correct 4 ms 19548 KB Output is correct
3 Correct 5 ms 19544 KB Output is correct
4 Correct 4 ms 19548 KB Output is correct
5 Correct 5 ms 19548 KB Output is correct
6 Correct 5 ms 19548 KB Output is correct
7 Correct 4 ms 19548 KB Output is correct
8 Correct 4 ms 19548 KB Output is correct
9 Correct 4 ms 19548 KB Output is correct
10 Correct 4 ms 19548 KB Output is correct
11 Correct 5 ms 19544 KB Output is correct
12 Correct 4 ms 19548 KB Output is correct
13 Correct 4 ms 19724 KB Output is correct
14 Correct 4 ms 19548 KB Output is correct
15 Correct 4 ms 19548 KB Output is correct
16 Correct 5 ms 19548 KB Output is correct
17 Correct 5 ms 19548 KB Output is correct
18 Correct 4 ms 19736 KB Output is correct
19 Correct 5 ms 19548 KB Output is correct
20 Correct 4 ms 19640 KB Output is correct
21 Correct 5 ms 19804 KB Output is correct
22 Correct 5 ms 19804 KB Output is correct
23 Correct 5 ms 19800 KB Output is correct
24 Correct 6 ms 19804 KB Output is correct
25 Correct 5 ms 19804 KB Output is correct
26 Correct 6 ms 19804 KB Output is correct
27 Correct 6 ms 19800 KB Output is correct
28 Correct 6 ms 19800 KB Output is correct
29 Correct 6 ms 19804 KB Output is correct
30 Correct 6 ms 19900 KB Output is correct
31 Correct 6 ms 19804 KB Output is correct
32 Correct 6 ms 20060 KB Output is correct
33 Correct 5 ms 20060 KB Output is correct
34 Correct 5 ms 19804 KB Output is correct
35 Correct 5 ms 19804 KB Output is correct
36 Correct 5 ms 19804 KB Output is correct
37 Correct 5 ms 19804 KB Output is correct
38 Correct 5 ms 19804 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 19544 KB Output is correct
2 Correct 4 ms 19548 KB Output is correct
3 Correct 5 ms 19544 KB Output is correct
4 Correct 4 ms 19548 KB Output is correct
5 Correct 5 ms 19548 KB Output is correct
6 Correct 5 ms 19548 KB Output is correct
7 Correct 4 ms 19548 KB Output is correct
8 Correct 4 ms 19548 KB Output is correct
9 Correct 4 ms 19548 KB Output is correct
10 Correct 4 ms 19548 KB Output is correct
11 Correct 5 ms 19544 KB Output is correct
12 Correct 4 ms 19548 KB Output is correct
13 Correct 4 ms 19724 KB Output is correct
14 Correct 4 ms 19548 KB Output is correct
15 Correct 4 ms 19548 KB Output is correct
16 Correct 5 ms 19548 KB Output is correct
17 Correct 5 ms 19548 KB Output is correct
18 Correct 4 ms 19736 KB Output is correct
19 Correct 115 ms 41160 KB Output is correct
20 Correct 100 ms 41808 KB Output is correct
21 Correct 112 ms 41424 KB Output is correct
22 Correct 102 ms 41524 KB Output is correct
23 Correct 154 ms 54156 KB Output is correct
24 Correct 110 ms 44692 KB Output is correct
25 Correct 89 ms 41796 KB Output is correct
26 Correct 53 ms 48980 KB Output is correct
27 Correct 146 ms 49492 KB Output is correct
28 Correct 284 ms 88568 KB Output is correct
29 Correct 283 ms 87076 KB Output is correct
30 Correct 150 ms 49864 KB Output is correct
31 Correct 149 ms 49912 KB Output is correct
32 Correct 225 ms 49748 KB Output is correct
33 Correct 201 ms 54856 KB Output is correct
34 Correct 350 ms 87248 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 19544 KB Output is correct
2 Correct 4 ms 19548 KB Output is correct
3 Correct 5 ms 19544 KB Output is correct
4 Correct 4 ms 19548 KB Output is correct
5 Correct 5 ms 19548 KB Output is correct
6 Correct 5 ms 19548 KB Output is correct
7 Correct 4 ms 19548 KB Output is correct
8 Correct 4 ms 19548 KB Output is correct
9 Correct 4 ms 19548 KB Output is correct
10 Correct 4 ms 19548 KB Output is correct
11 Correct 5 ms 19544 KB Output is correct
12 Correct 4 ms 19548 KB Output is correct
13 Correct 4 ms 19724 KB Output is correct
14 Correct 4 ms 19548 KB Output is correct
15 Correct 4 ms 19548 KB Output is correct
16 Correct 5 ms 19548 KB Output is correct
17 Correct 5 ms 19548 KB Output is correct
18 Correct 4 ms 19736 KB Output is correct
19 Correct 5 ms 19548 KB Output is correct
20 Correct 4 ms 19640 KB Output is correct
21 Correct 5 ms 19804 KB Output is correct
22 Correct 5 ms 19804 KB Output is correct
23 Correct 5 ms 19800 KB Output is correct
24 Correct 6 ms 19804 KB Output is correct
25 Correct 5 ms 19804 KB Output is correct
26 Correct 6 ms 19804 KB Output is correct
27 Correct 6 ms 19800 KB Output is correct
28 Correct 6 ms 19800 KB Output is correct
29 Correct 6 ms 19804 KB Output is correct
30 Correct 6 ms 19900 KB Output is correct
31 Correct 6 ms 19804 KB Output is correct
32 Correct 6 ms 20060 KB Output is correct
33 Correct 5 ms 20060 KB Output is correct
34 Correct 5 ms 19804 KB Output is correct
35 Correct 5 ms 19804 KB Output is correct
36 Correct 5 ms 19804 KB Output is correct
37 Correct 5 ms 19804 KB Output is correct
38 Correct 5 ms 19804 KB Output is correct
39 Correct 115 ms 41160 KB Output is correct
40 Correct 100 ms 41808 KB Output is correct
41 Correct 112 ms 41424 KB Output is correct
42 Correct 102 ms 41524 KB Output is correct
43 Correct 154 ms 54156 KB Output is correct
44 Correct 110 ms 44692 KB Output is correct
45 Correct 89 ms 41796 KB Output is correct
46 Correct 53 ms 48980 KB Output is correct
47 Correct 146 ms 49492 KB Output is correct
48 Correct 284 ms 88568 KB Output is correct
49 Correct 283 ms 87076 KB Output is correct
50 Correct 150 ms 49864 KB Output is correct
51 Correct 149 ms 49912 KB Output is correct
52 Correct 225 ms 49748 KB Output is correct
53 Correct 201 ms 54856 KB Output is correct
54 Correct 350 ms 87248 KB Output is correct
55 Correct 18 ms 22620 KB Output is correct
56 Correct 11 ms 21340 KB Output is correct
57 Correct 61 ms 38744 KB Output is correct
58 Correct 43 ms 32704 KB Output is correct
59 Correct 90 ms 55460 KB Output is correct
60 Correct 294 ms 87676 KB Output is correct
61 Correct 220 ms 52852 KB Output is correct
62 Correct 149 ms 49700 KB Output is correct
63 Correct 205 ms 49748 KB Output is correct
64 Correct 489 ms 103940 KB Output is correct
65 Correct 455 ms 102740 KB Output is correct
66 Correct 314 ms 82568 KB Output is correct
67 Correct 144 ms 44556 KB Output is correct
68 Correct 323 ms 66484 KB Output is correct
69 Correct 346 ms 70116 KB Output is correct
70 Correct 313 ms 64836 KB Output is correct