Submission #1074800

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074800		Icelast	Bosses (BOI16_bosses)	C++17	100 / 100	717 ms	1500 KiB

bosses

#include <iostream>
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const ll maxn = 2*1e5+5, INF = 4e18+9;
void solve(){
    int n;
    cin >> n;
    vector<int> a(n+1);
    vector<vector<int>> boss(n+1), canboss(n+1), canboss2;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        for(int j = 1; j <= a[i]; j++){
            int v;
            cin >> v;
            boss[i].push_back(v);
            canboss[v].push_back(i);
        }
    }
    canboss2 = canboss;
    vector<vector<int>> adj(n+1);
    vector<int> cur, t, vis(n+1, 0);
    ll ans = INF;
    for(int root = 1; root <= n; root++){
        canboss = canboss2;
        ll res = 0;
        ll left = n-1;
        for(int i = 1; i <= n; i++) vis[i] = 0;
        vis[root] = 1;
        cur.clear();
        cur.push_back(root);
        for(ll d = 1; d <= n; d++){
            if(cur.empty()) break;
            t.clear();
            res += d*cur.size();
            for(int i : cur){
                while(!canboss[i].empty()){
                    int j = canboss[i].back();

                    canboss[i].pop_back();
                    if(vis[j]) continue;
                    vis[j] = 1;
                    t.push_back(j);

                    left--;
                }
            }
            cur = t;
        }
        if(left > 0) res = INF;
        ans = min(ans, res);
    }
    cout << ans;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    solve();
}

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