#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
bool myfunction (int i,int j) { return (i>j); }

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