#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,sum=0,a;
	cin>>n;
	switch(n){
		case 1: cin>>a; sum+=a; cout<<sum; break;
		case 2: cin>>a; sum+=a; cin>>a; sum+=sqrt(a); cout<<sum; break;
		case 3: cin>>a; sum+=a; cin>>a; sum+=sqrt(a); cin>>a; sum+=sqrt(sqrt(a)); cout<<sum; break;
	}
}