#include <bits/stdc++.h>
using namespace std;
int main()
{
	int n, cnt = 0, t = 0;
	cin >> n;
	int x[100000] = {0};
	for (int i = 0; i <= n - 1; i++)
	{
		cin >> x[i];
	}
	for (int i = 0; i <= n - 1; i++)
	{
		sort(x, x + n);
		cnt += x[n - 1];
		x[n - 1] = 0;
		t++;
		for (int i = t; i <= n - 1; i++)
		{
			x[i] = int(sqrt(x[i]));
		}
	}
	cout << cnt;
	return 0;
}