Submission #1108454

#	Time	Username	Problem	Language	Result	Execution time	Memory
1108454		0pt1mus23	Bosses (BOI16_bosses)	C++14	100 / 100	431 ms	856 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define int long long int
#define ins insert      
#define pb push_back
#define endl '\n'
#define putr(x) cout<<x<<endl;return; 
#define all(x) x.begin(),x.end()
const int mod = 1e9 +7, sze = 5e3 +10, inf = LLONG_MAX, LG = 20;
vector<int> graph[sze];
int used[sze];
void rush(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        int k;cin>>k;
        for(int j=1;j<=k;j++){
            int u;cin>>u;
            graph[u].pb(i);
        }
    }
    int ans=inf;
    for(int i=1;i<=n;i++){
        queue<pair<int,int>> q;
        q.push({i,1});
        int qaldi= n;
        for(int j=0;j<=n;j++){
            used[j]=0;
        }
        used[i]=1;
        int curr= 0;
        while(!q.empty()){
            auto node = q.front();q.pop();
            qaldi--;
            curr += node.second;
            for(auto v:graph[node.first]){
                if(!used[v]){
                    used[v]=1;
                    q.push({v,node.second +1});
                }
            }

        }
        if(!qaldi){
            ans=min(ans,curr);
        }

    }
    putr(ans);
}
 
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    int tt = 1; 
    // cin>>tt;
 
    while(tt--){
        rush();
    }
 
    return 0;
}

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