#include <bits/stdc++.h>
using namespace std;
long long s[100005];
bool cmp(int a, int b)
{
	return a > b;
}
int main()
{
	int n, p = 0;
	cin >> n;
	for (int i = 1; i <= n; i++)
	{
		cin >> s[i];
	}
	sort(s + 1, s + n + 1, cmp);
	p = s[1];
	for (int i = 2; i <= n; i++)
	{
		for (int j = 1; j <= n; j++)
		{
			s[j] = (int)sqrt(s[j]);
		}
		p += s[i];
	}
	cout << p;
	return 0;
}