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

int a[100005];

int main()
{
	int n;
	scanf("%d", &n);
	for (int i = 1; i <= n; i++)
		scanf("%d", &a[i]);
	int sum = 0;
	while (n)
	{
		sort(a + 1, a + n + 1);
		sum += a[n];
		n--;
		for (int i = 1; i <= n; i++)
			a[i] = sqrt(a[i]);
	}
	printf("%d\n", sum);
	return 0;
}