#include<bits/stdc++.h>
using namespace std;
long long a[100005];
int main()
{
	freopen("p3.in","r",stdin);
	freopen("p3.out","w",stdout);
	long long n,nn;
	cin>>n;
	nn=n;
	for(long long i=0;i<n;i++)
	{
		cin>>a[i];
	}
	int ans=0;
	while(nn--)
	{
		sort(a,a+n);
		ans+=a[n-1];
		a[n-1]=0;
		for(int i=0;i<n;i++)
		{
			a[i]=(long long)sqrt(a[i]);
		}
	}
	cout<<ans<<endl;
	return 0;
}