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

int main()
{
	long long n ;
	cin >> n ;
	long long a[n+1] ;
	int sum = 0 ;
	for ( int i = 1 ; i <= n ; i ++ )
	{
		cin >> a[i] ;
	}
	for ( int i = 1 ; i <= n ; i ++ )
	{
		int maxi = 0 ;
		if ( maxi < a[i] )
		{
			maxi = a[i] ;
		}
	}
	for ( int i = 1 ; i <= n ; i ++ )
	{
		
		if ( a[i] == 1 )
		{
			sum += a[i] ;
			break ;
		}
		int maxi = 0 ;
		if ( maxi < a[i] )
		{
			maxi = a[i] ;
		} 
//		cout << "maxi :"<< maxi << endl ;
		sum += maxi ;
//		cout << "sum :"<< sum << endl ;
		for ( int j = i+1 ; j <= n ; j ++ )
		{
			a[j] = (int)sqrt(a[j]) ;
//			cout << a[j] << endl ;
		} 
	}
	cout << sum << endl ;
	return 0 ;
}