#include <bits/stdc++.h>
#define ll long long
using namespace std;
ll n,o,ans,a[100005];
bool b;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++) cin>>a[i];
	sort(a+1,a+n+1);
	for(int i=n;i>=1;i--)
	{
		if(b) ans++;
		else
		{
			for(int j=1;j<=o;j++)
			{
				a[i]=int(sqrt(a[i]));
				if(a[i]==1)
				{
					b=1;
					break;
				}
			}			
			ans+=a[i];
			o++;
		}
	}
	cout<<ans<<endl;
	return 0;
}