#include<bits/stdc++.h>
using namespace std;
//fjj ywc 100 p3 d3 ÃÀζˮ¹û 
long long y=0,tmp,n,a[100005];
bool  cmp(int a,int b)
{
	return b<a;
}
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin>>n;
	for(int i=1;i<=n;++i)
	{
		cin>>a[i];
	}
	sort(a+1,a+n+1,cmp);
	//cout<<y<<endl;
	for(int i=1;i<=n;++i)
	{
		//cout<<"         "<<a[i]<<endl;
		if(i==1)
		{
			y+=a[i];
		}
		else
		{
			for(int j=1;j<i;++j)
			{
				a[i]=(int)sqrt(a[i]);
			} 
			
			y+=a[i];
		}
		//cout<<"  "<<a[i]<<endl;;
		//cout<<y<<endl;
	}
	cout<<y<<endl;
	return 0;
}