Submission #305561

#	Time	Username	Problem	Language	Result	Execution time	Memory
305561		vipghn2003	Bosses (BOI16_bosses)	C++14	100 / 100	784 ms	760 KiB

bosses

#include<bits/stdc++.h>

using namespace std;
const int N=5005;
int n,d[N];
vector<int>adj[N];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        int m;
        cin>>m;
        while(m--)
        {
            int p;
            cin>>p;
            adj[p].push_back(i);
        }
    }
    long long res=1e18;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++) d[j]=-1;
        queue<int>pq;
        d[i]=1;
        pq.push(i);
        while(!pq.empty())
        {
            int u=pq.front();
            pq.pop();
            for(auto&v:adj[u])
            {
                if(d[v]==-1)
                {
                    d[v]=d[u]+1;
                    pq.push(v);
                }
            }
        }
        bool check=true;
        for(int j=1;j<=n;j++) if(d[j]==-1) check=false;
        if(check)
        {
            long long cur=0;
            for(int j=1;j<=n;j++) cur+=d[j];
            res=min(res,cur);
        }
    }
    cout<<res;
}

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