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Submission #1026051

# Submission time Handle Problem Language Result Execution time Memory
1026051 2024-07-17T13:40:14 Z vanea Race (IOI11_race) C++17
21 / 100
 3000 ms 30036 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, map<int, int>& d) {
    if(s > k) return ;
    if(filling) {
        if(!d.count(s)) d[s] = dist;
        else d[s] = min(d[s], dist);
    }
    else {
        if(d.count(k-s)) 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;
    map<int, int> m;
    m[0] = 0;
    for(auto [it, w] : adj[c]) {
        if(vis[it]) continue;
        get_min(it, c, 0, 1, w, m);
        get_min(it, c, 1, 1, w, m);
    }
    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 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4952 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 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 4956 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 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4952 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 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 4956 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 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 4 ms 4928 KB Output is correct
21 Correct 3 ms 5212 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 2 ms 5212 KB Output is correct
24 Correct 3 ms 5212 KB Output is correct
25 Correct 3 ms 5212 KB Output is correct
26 Correct 3 ms 5212 KB Output is correct
27 Correct 3 ms 5212 KB Output is correct
28 Correct 3 ms 5212 KB Output is correct
29 Correct 4 ms 5220 KB Output is correct
30 Correct 3 ms 5212 KB Output is correct
31 Correct 3 ms 5328 KB Output is correct
32 Correct 3 ms 5212 KB Output is correct
33 Correct 4 ms 5212 KB Output is correct
34 Correct 3 ms 5072 KB Output is correct
35 Correct 3 ms 5212 KB Output is correct
36 Correct 3 ms 5212 KB Output is correct
37 Correct 5 ms 5468 KB Output is correct
38 Correct 4 ms 5460 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4952 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 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 4956 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 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 586 ms 11604 KB Output is correct
20 Correct 590 ms 11600 KB Output is correct
21 Correct 1025 ms 12452 KB Output is correct
22 Correct 147 ms 10580 KB Output is correct
23 Correct 54 ms 10588 KB Output is correct
24 Correct 50 ms 10608 KB Output is correct
25 Execution timed out 3056 ms 30036 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 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4952 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 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 4956 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 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 4 ms 4928 KB Output is correct
21 Correct 3 ms 5212 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 2 ms 5212 KB Output is correct
24 Correct 3 ms 5212 KB Output is correct
25 Correct 3 ms 5212 KB Output is correct
26 Correct 3 ms 5212 KB Output is correct
27 Correct 3 ms 5212 KB Output is correct
28 Correct 3 ms 5212 KB Output is correct
29 Correct 4 ms 5220 KB Output is correct
30 Correct 3 ms 5212 KB Output is correct
31 Correct 3 ms 5328 KB Output is correct
32 Correct 3 ms 5212 KB Output is correct
33 Correct 4 ms 5212 KB Output is correct
34 Correct 3 ms 5072 KB Output is correct
35 Correct 3 ms 5212 KB Output is correct
36 Correct 3 ms 5212 KB Output is correct
37 Correct 5 ms 5468 KB Output is correct
38 Correct 4 ms 5460 KB Output is correct
39 Correct 586 ms 11604 KB Output is correct
40 Correct 590 ms 11600 KB Output is correct
41 Correct 1025 ms 12452 KB Output is correct
42 Correct 147 ms 10580 KB Output is correct
43 Correct 54 ms 10588 KB Output is correct
44 Correct 50 ms 10608 KB Output is correct
45 Execution timed out 3056 ms 30036 KB Time limit exceeded
46 Halted 0 ms 0 KB -