#include<bits/stdc++.h>
using namespace std;

long long sum,a[100005];
int n;
bool cmp(long long a,long long b)
{
	return a>b;
}

int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		scanf("%lld",&a[i]);
	sort(a+1,a+n+1,cmp);
	for(int i=1;i<=n;i++)
	{
		sum+=a[i];
		for(int j=i+1;j<=n;j++)
		{
			if(a[i]<4)
			{
				printf("%lld",sum+(long long)(n-i));
				return 0;
			}
			a[j]=(long long)sqrt(a[j]);
		}
	}
	printf("%lld",sum);
	return 0;
}