Submission #1297984

#	Time	Username	Problem	Language	Result	Execution time	Memory
1297984		whtth	Bosses (BOI16_bosses)	C++20	100 / 100	390 ms	760 KiB

bosses

#include<bits/stdc++.h>
using namespace std;
long long n, d[100001], k, x, ans=1e18;
vector<int> ke[100001];
queue<int> qu;
int main(){
    ios::sync_with_stdio(0);cin.tie(nullptr);
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>k;
        for(int j=1;j<=k;j++){
            cin>>x;
            ke[x].push_back(i);
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++)d[j]=1e9;
        d[i]=1;
        qu.push(i);
        while(!qu.empty()){
            int t=qu.front();
            qu.pop();
            for(int v : ke[t]){
                if(d[v]>d[t]+1){
                    d[v]=d[t]+1;
                    qu.push(v);
                }
            }
        }
        long long sum=0;
        for(int j=1;j<=n;j++)sum+=d[j];
        ans=min(ans, sum);
    }
    cout<<ans;
    return 0;
}

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