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


int a[50],i,n;
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    cin>>n;
    for(i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n);
    long long int ans=0;
    
    for(i=n-1;i>=0;i--)
        {
    //    cout<<a[i]<<' ';
        ans = ans + a[i]*pow(2,n-1-i);  
}
    cout<<ans<<endl;
    return 0;
}