#include<bits/stdc++.h>
using namespace std;
bool cmp( int a, int b )
{
	return a > b;
}
int main()
{
	int n, a[100010], cnt = 0;
	cin >> n;
	for ( int i = 1; i <= n; i++ )
	{
		cin >> a[i];
	}
	sort ( a + 1, a + n + 1, cmp );
	for ( int i = 1; i < n; i++ )
	{
		cnt += a[i];
		for ( int j = i + 1; j <= n; j++ )
		{
			int k = int( sqrt(a[j]) );
			a[j] = k;
		}
	}
	cnt += a[n];
	cout << cnt << endl;
	return 0;
}