#include <bits/stdc++.h>
using namespace std;
const int MAX = 1e5;
int a[MAX];
int sum = 0;
int n;
int Max(int a[])
{
	int m = 0;
	int h;
	for (int i = 1; i <= n; i++)
	{
		if (a[i] > m)
		{
			m = a[i];
			h = i;
		} 
	}
	return h;
}
int main()
{
	cin >> n;
	for (int i = 1; i <= n; i++)
	{
		cin >> a[i];
	}
	for (int k = 1; k <= n; k++)
	{
		int t = Max(a);
		sum += a[t];
		a[t] = 0;
		for (int i = 1;i <= n; i++)
		{
			a[i] = (int)sqrt(a[i]);
		}
	}
	cout << sum << endl;
	return 0;
}