#include <bits/stdc++.h>
#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;
    int a[10001];
    
    for(int i=0;i<n;i++)
        cin>>a[i];
    
    sort(a,a+n);
    
    long long ans=0;
    
    for(int i=0;i<n;i++)
        ans+=a[i]*pow(2,n-1-i);
    
    cout<<ans;
    return 0;
}