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

int a[100001];

bool cmp(int a, int b)
{
	return a > b;
}
int main()
{
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++)
	{
		cin >> a[i];
	}
	sort(a + 1, a + n + 1, cmp);
	int ans = 0;
	for (int i = 1; i <= n; i++)
	{
		ans += a[i];
		for (int j = i + 1; j <= n; j++)
		{
			a[j] = sqrt(a[j]);
		}
	}
	cout << ans << endl;
	return 0;
}