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


int main() {
    int n;
    cin>>n;
    int a[n];
    
    long int mile,sum=0;
    for(int i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n);
    for(int i=0,j=n-1;i<n,j>=0;i++,j--)
        {
            sum=sum+a[j]*pow(2,i);
        }
    cout<<sum;
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}