#include <bits/stdc++.h>
//ÃÀζˮ¹û 
using namespace std;
int a[100005];
int main()
{
	int n;
	cin >> n;
	for (int i = 0;i < n;i++) 
	{
		cin >> a[i];
	}
	int s = 0;
	sort(a , a + n);
	for (int i = n -1;i > -1;i--)
	{
		s += a[i];
		a[i] = 0;
		for (int j = n - 1;j > -1;j--)
		{
			if (a[j] != 0)
			{
				a[j] = sqrt(a[j]);
			}
		}
	}
	cout << s;
	return 0;
}