#include<bits/stdc++.h>
using namespace std;
long long a[1000001],s;
void f(int n) {
	for(int i=1;i<=n;i++) {
	   a[i]=(int)sqrt(a[i]);
	}
}
int main()
{
	freopen("p3.in","r",stdin);
	freopen("p3.out","w",stdout);
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)cin>>a[i];
	sort(a+1,a+n+1);
	while(n!=0) {
	     s+=a[n];
	     n--;
	     f(n);
	}
	cout<<s;
	return 0;
}