#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>

using namespace std;


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