#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n,x[100005];
int main () {
	cin>>n;
	for(int i=1;i<=n;i++)cin>>x[i];
	sort(x+1,x+n+1);
	ll sum=max(n-6,0ll);
	for(int i=n;i>=n-5&&i>=1;i--){
		ll s=x[i];
		for(int j=1;j<=n-i;j++){
			ll y=(ll)sqrt(s);
			s=y;
		}
		sum+=s;
	}
	cout<<sum<<endl;
	return 0;
}