#include<bits/stdc++.h>
using namespace std;
int s = 0;
void eat( int n, int a[100010] )
{
	int maxn = 0, maxw;
	for ( int i = 0; i < n; i++ )
	{
		if ( a[i] > maxn )
		{
			maxn = a[i];
			maxw = i;
		}
	}
	s += a[maxw];
	a[maxw] = 0;
	for ( int i = 0; i < n; i++ )
	{
		a[i] = (int)sqrt(a[i]);
	}
}
int main()
{
	int a[100010];
	int n;
	cin >> n;
	for ( int i = 0; i < n; i++ )
	{
		cin >> a[i];
	}
	for ( int i = 0; i < n; i++ )
	{
		eat( n, a );
	}
	cout << s << endl;
	return 0;
}