#include<algorithm>
#include<iostream>
#include<math.h>
using namespace std;
int a[100001], n;
void all_sqrt()
{
	for(int i = 1;i <= n;i++)
	{
		if(a[i] != -1)
		{
			a[i] = sqrt(a[i]);
		}
//		cout << a[i] << " ";
	}
//	cout << endl;
}
int main()
{
	cin >> n;
	for(int i = 1;i <= n;i ++)
	{
		cin >> a[i];
	}
	sort(a + 1, a + n + 1);
	int ans = 0;
	for(int i = n;i >= 1;i --)
	{
		ans += a[i];
		a[i] = -1;
		all_sqrt();
	}
	cout << ans;
}