#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
   long int i,n,sum=0,cup=0;
   int a[100004]; 
    cin>>n;
    for(i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n,std::greater<int>());
    for( i=0;i<n;i++)
        {
             cup=pow(2,i)*a[i];
              sum+=cup;
    }
    cout<<sum;
    return 0;
}