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Submission #1026050

# Submission time Handle Problem Language Result Execution time Memory
1026050 2024-07-17T13:36:46 Z vanea Race (IOI11_race) C++17
9 / 100
 3000 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int mxN = 2e5+10;
const int mxK = 1e6+10;
const int INF = 1e9+10;
int ans = INF, k;

vector<array<int, 2>> adj[mxN];

bool vis[mxN];
int sz[mxN];

void get_sz(int node, int p) {
    sz[node] = 1;
    for(auto [it, w] : adj[node]) {
        if(it == p || vis[it]) continue;
        get_sz(it, node);
        sz[node] += sz[it];
    }
}

int get_c(int node, int p, int n) {
    for(auto [it, w] : adj[node]) {
        if(vis[it] || it == p) continue;
        if(sz[it] * 2 > n) return get_c(it, node, p);
    }
    return node;
}

void get_min(int node, int p, bool filling, int dist, int s, vector<int>& d) {
    if(s > k) return ;
    if(filling) {
        d[s] = min(d[s], dist);
    }
    else {
        ans = min(ans, dist+d[k-s]);
    }
    for(auto [it, w] : adj[node]) {
        if(it == p || vis[it]) continue;
        get_min(it, node, filling, dist+1, s+w, d);
    }
}

void build(int node) {
    get_sz(node, -1);
    int c = get_c(node, -1, sz[node]);
    vis[c] = true;
    vector<int> d(k+1, INF);
    d[0] = 0;
    for(auto [it, w] : adj[c]) {
        if(vis[it]) continue;
        get_min(it, c, 0, 1, w, d);
        get_min(it, c, 1, 1, w, d);
    }
    for(auto [it, w] : adj[c]) {
        if(vis[it]) continue;
        build(it);
    }
}

int best_path(int n, int K, int h[][2], int l[]) {
    for(int i = 0; i < n-1; i++) {
        adj[h[i][0]].push_back({h[i][1], l[i]});
        adj[h[i][1]].push_back({h[i][0], l[i]});
    }
    k = K;
    build(0);
    return (ans == INF ? -1 : ans);
}

/*
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout << best_path(4, 3, {{0, 1}, {1, 2}, {1, 3}},
                      {1, 2, 4});
}*/

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5008 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5008 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4952 KB Output is correct
21 Correct 3 ms 5208 KB Output is correct
22 Correct 1036 ms 62936 KB Output is correct
23 Correct 847 ms 64228 KB Output is correct
24 Correct 941 ms 52664 KB Output is correct
25 Correct 977 ms 44784 KB Output is correct
26 Correct 369 ms 22512 KB Output is correct
27 Correct 969 ms 52248 KB Output is correct
28 Correct 205 ms 17764 KB Output is correct
29 Correct 328 ms 20492 KB Output is correct
30 Correct 380 ms 26668 KB Output is correct
31 Correct 755 ms 41076 KB Output is correct
32 Correct 765 ms 44136 KB Output is correct
33 Correct 892 ms 69560 KB Output is correct
34 Correct 689 ms 120736 KB Output is correct
35 Correct 888 ms 218544 KB Output is correct
36 Runtime error 211 ms 262144 KB Execution killed with signal 9
37 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5008 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 517 ms 10512 KB Output is correct
20 Correct 525 ms 11472 KB Output is correct
21 Correct 764 ms 11220 KB Output is correct
22 Correct 87 ms 11860 KB Output is correct
23 Correct 56 ms 12112 KB Output is correct
24 Correct 40 ms 11868 KB Output is correct
25 Execution timed out 3060 ms 16532 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 3 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 5008 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4952 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4952 KB Output is correct
21 Correct 3 ms 5208 KB Output is correct
22 Correct 1036 ms 62936 KB Output is correct
23 Correct 847 ms 64228 KB Output is correct
24 Correct 941 ms 52664 KB Output is correct
25 Correct 977 ms 44784 KB Output is correct
26 Correct 369 ms 22512 KB Output is correct
27 Correct 969 ms 52248 KB Output is correct
28 Correct 205 ms 17764 KB Output is correct
29 Correct 328 ms 20492 KB Output is correct
30 Correct 380 ms 26668 KB Output is correct
31 Correct 755 ms 41076 KB Output is correct
32 Correct 765 ms 44136 KB Output is correct
33 Correct 892 ms 69560 KB Output is correct
34 Correct 689 ms 120736 KB Output is correct
35 Correct 888 ms 218544 KB Output is correct
36 Runtime error 211 ms 262144 KB Execution killed with signal 9
37 Halted 0 ms 0 KB -