#include<bits/stdc++.h>
using namespace std;
int a[100 + 5], sum;
int main()
{
	 int n, m, maxn = INT_MIN, minn;
	 cin >> n;
	 for(int i = 1; i <= n; i++)
	 {
	 	cin >> a[i];
	 	
		
	 }
	for(int i = 1; i <= n; i++)
	 {
	 	for(int j = 1; j <= n; j++)
	 	{
	 		if(a[j] > maxn) 
			{
			maxn = a[j];
			sum += maxn;
			a[j] = 0;
			maxn = INT_MIN;
			}
			else
			if(a[j] <= maxn)
			a[j] = sqrt(a[j]);
		}
	}
	cout << sum << endl;
	return 0; 
}