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


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