#include<bits/stdc++.h>
using namespace std;
int x[100010];
int main()
{
	int n,a=0;
	cin>>n;
	for(int i=1;i<=n;++i)
	{
		cin>>x[i];
		int y = (int)sqrt(x[i]);
		if(i==1)
		{
			a = a+x[i];
		}
		else
		{
		    a = a+y; 
		}
	} 
	cout<<a;
	return 0;
}