#include <bits/stdc++.h>

using namespace std;

typedef long long int lli;

lli power(lli a, lli y)
{
    if(y==0)
        return 1;
 else if(y==1)
        return a;
   else if(y%2==1)
        {lli x = power(a,y/2);
        return ((x*x)* a);
        }
   else
   {
       lli x=power(a,y/2);
        return (x*x);
   }
}


int main(){
    int n,x;
    long long int sm;
    cin >> n;
    vector<int> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    sort(calories.begin(),calories.end());
    sm=0;x=n-1;
    for(int i=n-1;i>-1;i--)
        {
    //    cout<<calories[i]<<endl;
        sm+=calories[i]*power(2,(x-i));
    }
    cout<<sm;
    
    return 0;
}