#include<bits/stdc++.h>
using namespace std ;
#define ll long long
#define  pb push_back
#define  mp make_pair
int main()
{
     ll int n,i;
      cin>>n ;
      ll int a [n];
      for(i=0;i<n;i++)
      {
      	cin>>a[i];
	  }
	  sort(a,a+n,greater<int>());
	  ll int s= 0 ;
	  for(i=0;i<n;i++)
	  {
	  	s=s+a[i]*pow(2,i);
	  }
	  //int ans =pow(2,n)*s;
	  cout<<s<<endl ;
	return 0;
}