Submission #951537

#	Time	Username	Problem	Language	Result	Execution time	Memory
951537		Faisal_Saqib	Bosses (BOI16_bosses)	C++17	100 / 100	912 ms	1108 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
const int N=5e3+1;
vector<int> tp[N],ma[N];
int val[N];
bitset<5001> vis;
int compute_answer(int&v)
{
    val[v]=0;
    int oth=0;
    for(int&ap:ma[v])
    {
        oth+=compute_answer(ap);
        val[v]+=val[ap];
    }
    val[v]++;
    return val[v]+oth;
}
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(0);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        int k;
        cin>>k;
        for(int j=1;j<=k;j++)
        {
            int p;
            cin>>p;
            tp[p].push_back(i);
        }
    }
    int ans=1e9;
    int vp=0;
    queue<int> q;
    for(int i=1;i<=n;i++)
    {
        // vis.clear();
        vis.reset();
        vp=0;
        {
            //Time = O()
            q.push(i);
            vis[i]=1;
            ma[i].clear();
            while(q.size())
            {
                int f=q.front();
                vp++;
                q.pop();
                for(int&ap:tp[f])
                {
                    if(!vis[ap])
                    {
                        vis[ap]=1;
                        ma[ap].clear();
                        ma[f].push_back(ap);
                        q.push(ap);
                    }
                }
            }
        }
        if(vp!=n)
            continue;
        ans=min(ans,compute_answer(i));
    }
    cout<<ans;
    return 0;
}

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