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Submission #401697

# Submission time Handle Problem Language Result Execution time Memory
401697 2021-05-10T17:38:00 Z sliviu Race (IOI11_race) C++14
100 / 100
 1357 ms 46276 KB 
#include <bits/stdc++.h>

using namespace std;

int best_path(int n, int k, int h[][2], int l[]) {
    int ans = INT_MAX;
    vector<vector<pair<int, int>>> G(n + 1);
    vector<int> seen(n + 1), s(n + 1);
    map<int, int> m;
    for (int i = 0; i < n - 1; ++i) {
        G[1 + h[i][0]].emplace_back(1 + h[i][1], l[i]);
        G[1 + h[i][1]].emplace_back(1 + h[i][0], l[i]);
    }
    function<void(int, int)> dfs = [&](int node, int last) {
        s[node] = 1;
        for (auto x : G[node])
            if (x.first != last && !seen[x.first]) {
                dfs(x.first, node);
                s[node] += s[x.first];
            }
    };
    function<int(int, int, int)> centroid = [&](int node, int last, int n) {
        for (auto x : G[node])
            if (x.first != last && !seen[x.first] && s[x.first] > n / 2)
                return centroid(x.first, node, n);
        return node;
    };
    function<void(int, int, int, int, int)> dfs2 = [&](int node, int last, int length1, int length2, int mode) {
        if (mode) {
            if (m.count(k - length1))
                ans = min(ans, m[k - length1] + length2);
        }
        else {
            if (m.count(length1))
                m[length1] = min(m[length1], length2);
            else
                m[length1] = length2;
        }
        for (auto x : G[node])
            if (x.first != last && !seen[x.first])
                dfs2(x.first, node, length1 + x.second, length2 + 1, mode);

    };
    function<void(int)> Build = [&](int node) {
        dfs(node, 0);
        int c = centroid(node, 0, s[node]);
        seen[c] = 1;
        m.clear();
        m[0] = 0;
        for (auto x : G[c])
            if (!seen[x.first])
                dfs2(x.first, c, x.second, 1, 1), dfs2(x.first, c, x.second, 1, 0);
        for (auto x : G[c])
            if (!seen[x.first])
                Build(x.first);
    };
    Build(1);
    return ans != INT_MAX ? ans : -1;
};

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 292 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 2 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 300 KB Output is correct
17 Correct 1 ms 296 KB Output is correct
18 Correct 1 ms 296 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 292 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 2 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 300 KB Output is correct
17 Correct 1 ms 296 KB Output is correct
18 Correct 1 ms 296 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 3 ms 440 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 2 ms 444 KB Output is correct
27 Correct 2 ms 316 KB Output is correct
28 Correct 3 ms 444 KB Output is correct
29 Correct 4 ms 332 KB Output is correct
30 Correct 3 ms 332 KB Output is correct
31 Correct 4 ms 436 KB Output is correct
32 Correct 3 ms 332 KB Output is correct
33 Correct 3 ms 332 KB Output is correct
34 Correct 2 ms 332 KB Output is correct
35 Correct 3 ms 332 KB Output is correct
36 Correct 2 ms 460 KB Output is correct
37 Correct 2 ms 332 KB Output is correct
38 Correct 3 ms 460 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 292 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 2 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 300 KB Output is correct
17 Correct 1 ms 296 KB Output is correct
18 Correct 1 ms 296 KB Output is correct
19 Correct 340 ms 9712 KB Output is correct
20 Correct 326 ms 9712 KB Output is correct
21 Correct 346 ms 9648 KB Output is correct
22 Correct 280 ms 9840 KB Output is correct
23 Correct 385 ms 9988 KB Output is correct
24 Correct 175 ms 9796 KB Output is correct
25 Correct 309 ms 17172 KB Output is correct
26 Correct 156 ms 18372 KB Output is correct
27 Correct 389 ms 19560 KB Output is correct
28 Correct 1311 ms 46276 KB Output is correct
29 Correct 1250 ms 44968 KB Output is correct
30 Correct 387 ms 19620 KB Output is correct
31 Correct 398 ms 19524 KB Output is correct
32 Correct 487 ms 19636 KB Output is correct
33 Correct 694 ms 18456 KB Output is correct
34 Correct 1141 ms 28508 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 292 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 2 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 300 KB Output is correct
17 Correct 1 ms 296 KB Output is correct
18 Correct 1 ms 296 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 3 ms 440 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 2 ms 444 KB Output is correct
27 Correct 2 ms 316 KB Output is correct
28 Correct 3 ms 444 KB Output is correct
29 Correct 4 ms 332 KB Output is correct
30 Correct 3 ms 332 KB Output is correct
31 Correct 4 ms 436 KB Output is correct
32 Correct 3 ms 332 KB Output is correct
33 Correct 3 ms 332 KB Output is correct
34 Correct 2 ms 332 KB Output is correct
35 Correct 3 ms 332 KB Output is correct
36 Correct 2 ms 460 KB Output is correct
37 Correct 2 ms 332 KB Output is correct
38 Correct 3 ms 460 KB Output is correct
39 Correct 340 ms 9712 KB Output is correct
40 Correct 326 ms 9712 KB Output is correct
41 Correct 346 ms 9648 KB Output is correct
42 Correct 280 ms 9840 KB Output is correct
43 Correct 385 ms 9988 KB Output is correct
44 Correct 175 ms 9796 KB Output is correct
45 Correct 309 ms 17172 KB Output is correct
46 Correct 156 ms 18372 KB Output is correct
47 Correct 389 ms 19560 KB Output is correct
48 Correct 1311 ms 46276 KB Output is correct
49 Correct 1250 ms 44968 KB Output is correct
50 Correct 387 ms 19620 KB Output is correct
51 Correct 398 ms 19524 KB Output is correct
52 Correct 487 ms 19636 KB Output is correct
53 Correct 694 ms 18456 KB Output is correct
54 Correct 1141 ms 28508 KB Output is correct
55 Correct 26 ms 1408 KB Output is correct
56 Correct 19 ms 1228 KB Output is correct
57 Correct 198 ms 9868 KB Output is correct
58 Correct 69 ms 9636 KB Output is correct
59 Correct 385 ms 22040 KB Output is correct
60 Correct 1315 ms 44484 KB Output is correct
61 Correct 453 ms 20980 KB Output is correct
62 Correct 448 ms 19616 KB Output is correct
63 Correct 517 ms 19660 KB Output is correct
64 Correct 1357 ms 24376 KB Output is correct
65 Correct 1222 ms 29528 KB Output is correct
66 Correct 1307 ms 43436 KB Output is correct
67 Correct 181 ms 20292 KB Output is correct
68 Correct 662 ms 28072 KB Output is correct
69 Correct 677 ms 28420 KB Output is correct
70 Correct 632 ms 26960 KB Output is correct