Submission #694134

#	Time	Username	Problem	Language	Result	Execution time	Memory
694134		DrearyJoke	Bosses (BOI16_bosses)	C++17	100 / 100	613 ms	716 KiB

bosses

#include<bits/stdc++.h>

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define END "\n"
#define rall(v) (v).rbegin(), (v).rend()
#define all(v) (v).begin(), (v).end()
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#include <ext/pb_ds/assoc_container.hpp>

using namespace __gnu_pbds;
template <typename T>
using ordered_set =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

void solve(){
    int n;
    cin >> n;
    vector<vector<int>> adj(n + 1);
    for (int i = 1; i <= n; ++i) {
        int k;
        cin >> k;
        while (k--) {
            int a;
            cin >> a;
            adj[a].push_back(i);
        }
    }   
    ll ans = LLONG_MAX;
    for (int s = 1; s <= n; ++s) {
        queue<int> q;
        vector<bool> vis(n + 1);
        vector<int> dist(n + 1);
        dist[s] = 1;
        vis[s] = 1;
        q.push(s);
        int tot = 0;
        ll sum = 0;
        while (!q.empty()) {
            ++tot;
            int v = q.front();
            sum += dist[v];
            q.pop();
            for (auto u: adj[v]) {
                if (!vis[u]) vis[u] = 1, dist[u] = dist[v] + 1, q.push(u);
            }
        }
        if (tot == n) ans = min(ans, sum);
    }
    cout << ans << END;
}
int main()
{
    fastio
    int t = 1;
    // cin>> t;
    while(t--) solve();
    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33