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