Submission #540184

#	Time	Username	Problem	Language	Result	Execution time	Memory
540184		status_coding	Bosses (BOI16_bosses)	C++14	100 / 100	596 ms	716 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

long long n,ans;
long long h[5005];
vector<int> v[5005];

long long solve(int p)
{
    for(int i=1;i<=n;i++)
        h[i]=-1;

    queue<pair<int, int>> q;
    q.push({p, 1});

    while(!q.empty())
    {
        int p = q.front().first;
        int len = q.front().second;
        q.pop();

        if(h[p] != -1)
            continue;

        h[p] = len;

        for(int it : v[p])
            if(h[it] == -1)
                q.push({it, len+1});
    }

    long long ans=0;
    for(int i=1;i<=n;i++)
    {
        if(h[i] == -1)
            return 1e18;
        ans += h[i];
    }

    return ans;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin>>n;
    for(int i=1;i<=n;i++)
    {
        int k;
        cin>>k;

        while(k)
        {
            k--;

            int x;
            cin>>x;

            v[x].push_back(i);
        }
    }

    long long ans=1e18;

    for(int i=1;i<=n;i++)
        ans=min(ans, solve(i));

    cout<<ans;
    return 0;
}

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