#include <bits/stdc++.h>
using namespace std;
#define int long long
bool cmp (int a, int b)
{
	return a > b;
}
signed main()
{
	int n;
	cin >> n;
	int ans = 0;
	int a[n + 1];
	for (int i = 1;i <= n;i++)
	{
		cin >> a[i];
	}
	sort (a + 1, a + n + 1, cmp);
	for (int i = 1;i <= n;i++)
	{
		for (int j = 2;j <= i;j++)
		{
			a[i] = sqrt (a[i]);
		}
		ans += a[i];
	} 
	cout << ans;
	return 0;
}