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답안 #515843

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
515843 2022-01-19T21:34:00 Z tabr 경주 (Race) (IOI11_race) C++17
100 / 100
 569 ms 97144 KB 
#include <bits/stdc++.h>
using namespace std;
#ifdef tabr
#include "library/debug.cpp"
#else
#define debug(...)
#endif

int best_path(int n, int k, int h[][2], int l[]) {
    vector<vector<int>> g(n);
    for (int i = 0; i < n - 1; i++) {
        g[h[i][0]].emplace_back(i);
        g[h[i][1]].emplace_back(i);
    }
    int ans = n;
    vector<int> depth(n);
    vector<long long> dist(n);
    vector<map<long long, int>> a(n);
    auto dfs = [&](auto dfs, int v, int p) -> void {
        vector<int> c;
        for (int id : g[v]) {
            int to = v ^ h[id][0] ^ h[id][1];
            if (to == p) {
                continue;
            }
            c.emplace_back(to);
            depth[to] = depth[v] + 1;
            dist[to] = dist[v] + l[id];
            dfs(dfs, to, v);
            long long t = dist[v] + k;
            if (a[to].count(t)) {
                ans = min(ans, a[to][t] - depth[v]);
            }
        }
        if (c.empty()) {
            a[v][dist[v]] = depth[v];
            return;
        }
        sort(c.begin(), c.end(), [&](int i, int j) {
            return a[i].size() > a[j].size();
        });
        swap(a[v], a[c[0]]);
        a[v][dist[v]] = depth[v];
        for (int i = 1; i < (int) c.size(); i++) {
            for (auto q : a[c[i]]) {
                long long t = 2 * dist[v] - q.first + k;
                if (a[v].count(t)) {
                    ans = min(ans, a[v][t] + q.second - 2 * depth[v]);
                }
            }
            for (auto q : a[c[i]]) {
                if (!a[v].count(q.first)) {
                    a[v][q.first] = n;
                }
                a[v][q.first] = min(a[v][q.first], q.second);
            }
        }
    };
    dfs(dfs, 0, -1);
    if (ans == n) {
        ans = -1;
    }
    return ans;
}

#ifdef tabr
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    return 0;
}
#endif

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 460 KB Output is correct
22 Correct 2 ms 588 KB Output is correct
23 Correct 2 ms 588 KB Output is correct
24 Correct 2 ms 588 KB Output is correct
25 Correct 1 ms 588 KB Output is correct
26 Correct 1 ms 588 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 2 ms 588 KB Output is correct
29 Correct 1 ms 588 KB Output is correct
30 Correct 2 ms 588 KB Output is correct
31 Correct 2 ms 588 KB Output is correct
32 Correct 3 ms 588 KB Output is correct
33 Correct 2 ms 588 KB Output is correct
34 Correct 1 ms 588 KB Output is correct
35 Correct 1 ms 588 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 1 ms 460 KB Output is correct
38 Correct 2 ms 588 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 147 ms 23936 KB Output is correct
20 Correct 143 ms 23848 KB Output is correct
21 Correct 125 ms 23764 KB Output is correct
22 Correct 157 ms 24272 KB Output is correct
23 Correct 188 ms 36800 KB Output is correct
24 Correct 153 ms 30184 KB Output is correct
25 Correct 101 ms 30468 KB Output is correct
26 Correct 61 ms 45836 KB Output is correct
27 Correct 204 ms 38836 KB Output is correct
28 Correct 237 ms 97144 KB Output is correct
29 Correct 238 ms 93636 KB Output is correct
30 Correct 207 ms 38980 KB Output is correct
31 Correct 199 ms 38816 KB Output is correct
32 Correct 258 ms 38832 KB Output is correct
33 Correct 222 ms 38472 KB Output is correct
34 Correct 403 ms 70428 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 460 KB Output is correct
22 Correct 2 ms 588 KB Output is correct
23 Correct 2 ms 588 KB Output is correct
24 Correct 2 ms 588 KB Output is correct
25 Correct 1 ms 588 KB Output is correct
26 Correct 1 ms 588 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 2 ms 588 KB Output is correct
29 Correct 1 ms 588 KB Output is correct
30 Correct 2 ms 588 KB Output is correct
31 Correct 2 ms 588 KB Output is correct
32 Correct 3 ms 588 KB Output is correct
33 Correct 2 ms 588 KB Output is correct
34 Correct 1 ms 588 KB Output is correct
35 Correct 1 ms 588 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 1 ms 460 KB Output is correct
38 Correct 2 ms 588 KB Output is correct
39 Correct 147 ms 23936 KB Output is correct
40 Correct 143 ms 23848 KB Output is correct
41 Correct 125 ms 23764 KB Output is correct
42 Correct 157 ms 24272 KB Output is correct
43 Correct 188 ms 36800 KB Output is correct
44 Correct 153 ms 30184 KB Output is correct
45 Correct 101 ms 30468 KB Output is correct
46 Correct 61 ms 45836 KB Output is correct
47 Correct 204 ms 38836 KB Output is correct
48 Correct 237 ms 97144 KB Output is correct
49 Correct 238 ms 93636 KB Output is correct
50 Correct 207 ms 38980 KB Output is correct
51 Correct 199 ms 38816 KB Output is correct
52 Correct 258 ms 38832 KB Output is correct
53 Correct 222 ms 38472 KB Output is correct
54 Correct 403 ms 70428 KB Output is correct
55 Correct 15 ms 3660 KB Output is correct
56 Correct 8 ms 2380 KB Output is correct
57 Correct 75 ms 21928 KB Output is correct
58 Correct 56 ms 19756 KB Output is correct
59 Correct 76 ms 48796 KB Output is correct
60 Correct 234 ms 94916 KB Output is correct
61 Correct 234 ms 42232 KB Output is correct
62 Correct 202 ms 38776 KB Output is correct
63 Correct 310 ms 38928 KB Output is correct
64 Correct 543 ms 88548 KB Output is correct
65 Correct 569 ms 88764 KB Output is correct
66 Correct 249 ms 86012 KB Output is correct
67 Correct 223 ms 39400 KB Output is correct
68 Correct 386 ms 56660 KB Output is correct
69 Correct 402 ms 57356 KB Output is correct
70 Correct 360 ms 54248 KB Output is correct