#include<algorithm>
#include<iostream>
#include<cmath>
using namespace std;

int n,ans;
int arr[100005];

int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>arr[i];
	}
	sort(arr,arr+n);
	for(int i=n-1;i>-1;i--){
		for(int j=0;j<n-i-1;j++){
			arr[i]=sqrt(arr[i]);
		}
		ans+=arr[i];
	}
	cout<<ans<<endl;
	return 0;
}