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Submission #1112054

# Submission time Handle Problem Language Result Execution time Memory
1112054 2024-11-13T15:09:03 Z FucKanh Race (IOI11_race) C++14
9 / 100
 121 ms 53716 KB 
#include <bits/stdc++.h>
#include <race.h>
#define ll long long
#define pii pair<long long,long long>

using namespace std;

const ll maxn = 2e5 + 2;

ll sz[maxn],h[maxn],k;
vector<pii> a[maxn];
ll ans = LLONG_MAX;
map<ll,ll> mp[maxn];

void dfs(ll u, ll w, ll pa) {
    for (pii tmp : a[u]) {
        ll wv,v; tie(v,wv) = tmp;
        if (v==pa) continue;
        h[v] = h[u] + 1;
        dfs(v,w+wv,u);

        ll t = mp[v][w+wv];
        mp[v][w+wv] = (t == 0) ? h[v] : min(t,h[v]);

        if (mp[u].size() < mp[v].size()) swap(mp[u],mp[v]);

        for (pii val : mp[v]) {
            if (val.second==0) continue;
            if (val.first - w < k && mp[u][k-val.first+w] != 0) {
                ans = min(ans, mp[u][k-val.first+w] - h[u] + val.second - h[u]);
            }
        }

        mp[u].insert(mp[v].begin(),mp[v].end());
        if (mp[u][w + k] != 0) {
            ans = min(ans, mp[u][w+k]-h[u]);
        }
    }

}

int best_path(int _n, int _k, int _h[][2], int _L[])
{
    k = _k;
    for (ll i = 0; i < _n - 1; i++){
        ll x = _h[i][0], y = _h[i][1];
        ll w = _L[i];
        a[x].push_back({y,w});
        a[y].push_back({x,w});
    }
    h[0] = 1;
    dfs(0,0,-1);
    return (int) ans == LLONG_MAX ? -1 : ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 18768 KB Output is correct
2 Correct 3 ms 18768 KB Output is correct
3 Correct 3 ms 18908 KB Output is correct
4 Correct 3 ms 18768 KB Output is correct
5 Correct 3 ms 18768 KB Output is correct
6 Correct 3 ms 18768 KB Output is correct
7 Correct 3 ms 18948 KB Output is correct
8 Correct 3 ms 18768 KB Output is correct
9 Correct 3 ms 18768 KB Output is correct
10 Correct 3 ms 18880 KB Output is correct
11 Correct 3 ms 18768 KB Output is correct
12 Correct 3 ms 18936 KB Output is correct
13 Correct 3 ms 18768 KB Output is correct
14 Correct 3 ms 18768 KB Output is correct
15 Correct 3 ms 18768 KB Output is correct
16 Correct 3 ms 18768 KB Output is correct
17 Correct 4 ms 18768 KB Output is correct
18 Correct 3 ms 18768 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 18768 KB Output is correct
2 Correct 3 ms 18768 KB Output is correct
3 Correct 3 ms 18908 KB Output is correct
4 Correct 3 ms 18768 KB Output is correct
5 Correct 3 ms 18768 KB Output is correct
6 Correct 3 ms 18768 KB Output is correct
7 Correct 3 ms 18948 KB Output is correct
8 Correct 3 ms 18768 KB Output is correct
9 Correct 3 ms 18768 KB Output is correct
10 Correct 3 ms 18880 KB Output is correct
11 Correct 3 ms 18768 KB Output is correct
12 Correct 3 ms 18936 KB Output is correct
13 Correct 3 ms 18768 KB Output is correct
14 Correct 3 ms 18768 KB Output is correct
15 Correct 3 ms 18768 KB Output is correct
16 Correct 3 ms 18768 KB Output is correct
17 Correct 4 ms 18768 KB Output is correct
18 Correct 3 ms 18768 KB Output is correct
19 Incorrect 3 ms 18768 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 18768 KB Output is correct
2 Correct 3 ms 18768 KB Output is correct
3 Correct 3 ms 18908 KB Output is correct
4 Correct 3 ms 18768 KB Output is correct
5 Correct 3 ms 18768 KB Output is correct
6 Correct 3 ms 18768 KB Output is correct
7 Correct 3 ms 18948 KB Output is correct
8 Correct 3 ms 18768 KB Output is correct
9 Correct 3 ms 18768 KB Output is correct
10 Correct 3 ms 18880 KB Output is correct
11 Correct 3 ms 18768 KB Output is correct
12 Correct 3 ms 18936 KB Output is correct
13 Correct 3 ms 18768 KB Output is correct
14 Correct 3 ms 18768 KB Output is correct
15 Correct 3 ms 18768 KB Output is correct
16 Correct 3 ms 18768 KB Output is correct
17 Correct 4 ms 18768 KB Output is correct
18 Correct 3 ms 18768 KB Output is correct
19 Incorrect 121 ms 53716 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 18768 KB Output is correct
2 Correct 3 ms 18768 KB Output is correct
3 Correct 3 ms 18908 KB Output is correct
4 Correct 3 ms 18768 KB Output is correct
5 Correct 3 ms 18768 KB Output is correct
6 Correct 3 ms 18768 KB Output is correct
7 Correct 3 ms 18948 KB Output is correct
8 Correct 3 ms 18768 KB Output is correct
9 Correct 3 ms 18768 KB Output is correct
10 Correct 3 ms 18880 KB Output is correct
11 Correct 3 ms 18768 KB Output is correct
12 Correct 3 ms 18936 KB Output is correct
13 Correct 3 ms 18768 KB Output is correct
14 Correct 3 ms 18768 KB Output is correct
15 Correct 3 ms 18768 KB Output is correct
16 Correct 3 ms 18768 KB Output is correct
17 Correct 4 ms 18768 KB Output is correct
18 Correct 3 ms 18768 KB Output is correct
19 Incorrect 3 ms 18768 KB Output isn't correct
20 Halted 0 ms 0 KB -