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

int main()
{
	int a;
	cin >> a;
	int b[a+1];
	for (int i = 1;i<=a;i++)
	{
		cin >> b[i];
	}
	int h = 0,cnt = 0;
	sort(b+1,b+a+1);
	for (int i = a;i>=1;i--)
	{
		if (b[i]==1)
		{
			h++;
			continue;
		}
		int m = b[i];
		for (int i = 0;i<cnt;i++)
		{
			m = sqrt(m);
		}
		h+=m;
		cnt++;
	}
	cout << h;
	return 0;
}