#include <bits/stdc++.h>

using namespace std;
int calories[211111] ;
int main(){
    int n;
    cin >> n;
    
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
       
    }
     sort(calories,calories+n) ;
        int cnt =0 ;
        reverse(calories,calories+n) ;
        long long ans =0 ;
        for(int i=0;i<n;++i)
            ans += calories[i]*(1LL<<(cnt++)) ;
    printf("%lld",ans) ;
    // your code goes here
    return 0;
}