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

int main(){
	int n;
	cin>>n;
	vector<long long>a(n);
	for(int i=0;i<n;++i){
		cin>>a[i];
	}
	long long ans=0;
	sort(a.begin(),a.end());
	reverse(a.begin(),a.end());
	for(int i=0;i<n;++i){
		for(int j=0;j<i;++j){
			a[i]=(long long)sqrt(a[i]);
		}
		ans+=a[i];
	}
	cout<<ans<<endl;
	return 0;
}