Submission #747990

#	Time	Username	Problem	Language	Result	Execution time	Memory
747990		vjudge1	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	340 KiB

bosses

#include <bits/stdc++.h>

using namespace std;
using ll=long long;

const int maxn=5001;
    int n;
vector<int> g[maxn];
ll bfs(int s){
    queue<int> q;
    ll d[maxn];
    d[s]=1;
    q.push(s);
    ll sum=0, cnt=1;
    while(!q.empty()){
        int x=q.front();
        q.pop();
        sum += d[x];
        for(int i:g[x]){
            if(!d[i]){
                cnt++;
                d[i]=d[x]+1;
                q.push(i);
            }
        }
    }
    return cnt==n?sum:LLONG_MAX;
}

int main()
{
    cin >> n;
    for(int i=1;i<=n;i++){
        int k;
        cin>>k;
        for(int j=0;j<k;j++) {
            int x;
            cin>>x;
            g[x].push_back(i);
        }
    }
    ll ans=LLONG_MAX;
    for(int i=1;i<=n;i++){
        ans=min(ans, bfs(i));
    }
    cout<<ans<<endl;
    return 0;
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33