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