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

int main()
{
	int n, sum = 0, y = 0;
	cin >> n;
	for(int i = 1; i <= n; i++)
	{
		long long a;
		cin >> a;
		if(i == 1)
		{
			sum += a;	
		}else
		{
			y = sqrt(a);
			sum += y;	
		}													
	}
	cout << sum;
	
	return 0;
}