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


int main() {
    long long n,i,j,k,ans=0,p=1;
    cin>>n;
    
     long long a[n];
    for(i=0;i<n;i++){
        cin>>a[i];
    }
    sort(a,a+n);
    for(i=n-1;i>=0;i--){
        ans+= a[i]*p;
        p=p*2;
    }
    cout<<ans<<endl;
    return 0;
}