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

int main()
{
	int n,s = 0,cnt = 0;
	cin >> n;
	int a[n + 1];
	for (int i = 1;i <= n;i++)
	{
		cin >> a[i];
	}
	sort (a + 1,a + 1 + n);
	for (int i = n - cnt;i >= 1;i--)
	{
		cnt++;
		s += a[i];
		for (int j = i - 1;j >= 1;j--)
		{
			a[j] = sqrt(a[j]);
		}
	}
	cout << s;
	return 0;
}