#include <iostream>
#include <cmath>
#include <algorithm>
using namespace std;
int a[100005];
bool cmp(int x, int y)
{
	return x > y;
}
int main()
{
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++)
	{
		cin >> a[i];
	}
	sort(a + 1, a + n + 1, cmp);
	int sum = 0;
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j < i; j++)
		{
			a[i] = (int)sqrt(a[i]);
		}
		if(a[i] == 1)
		{
			sum += n - i + 1;
			break;
		}
		sum += a[i];
	}
	cout << sum;
	return 0;
}