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

long long a[100005];

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++)
		cin >> a[i];
	sort(a + 1, a + n + 1);
	long long ans = 0;
	for (int i = n; i >= 1; i--)
	{
		for (int j = 1; j <= n - i; j++)
			a[i] = (long long)sqrt(a[i]);
		ans += a[i];
	}
	cout << ans << '\n';
	return 0;
}