#include<bits/stdc++.h>
using namespace std;
int a[199999];
int n;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
	}
	int eat=0;
	int times=n;
	while(times--)
	{
		sort(a+1,a+1+n);
		eat+=a[n];
		a[n]=0;
		for(int i=1;i<=n;i++)
		{
			a[i]=(int)sqrt(a[i]);
		}
	}
	cout<<eat;
}