#include <cmath>
#include <cstdio>
#include <vector>
#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;
    long a[n];
    for(int i=0;i<n;i++)
    {
        cin>>a[i];
    }
    sort(a, a + n);
    long sum=0;
    long pow=1;
    for(int i=n-1;i>=0;i--)
    {
        sum+=pow*a[i];
        pow*=2;
    }
    cout<<sum;
    
    
    return 0;
}