#include <bits/stdc++.h>
using namespace std;

int n,a[100010];

bool cmp(int x,int y)
{
	return x > y;
}

int main()
{
	cin >> n;
	for(int i = 1;i <= n;i++)
	{
		cin >> a[i];
	}
	long long sum = 0;
	sort(a + 1,a + n + 1,cmp);
	for(int i = 1;i <= n;i++)
	{
		for(int j = 1;j < i;j++)
		{
			a[i] = (long long)sqrt(a[i]);
			if(a[i] == 1)
			{
				break;
			}
		}
		sum += a[i];
	}
	cout << sum << "\n";
	return 0;
}