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

int main(){
	int n,ans=0,t=0;
	int a[1000000000],b[1000000000];
	cin>>n;
	for(int i=0;i<n;++i){
		cin>>a[i];
		b[i]=a[i];
		if(b[i]>=a[i]){
			ans+=b[i];
			t++;
		}
		a[i+1]=sqrt(a[i+1]);
		
	}
	
	
	
	cout<<ans<<endl;
	return 0;
}