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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    long long ans = 0;
    int n;
    std::list<int> A;
    cin>>n;
    for (int i =0; i<n ; i++)
    {
       int num;
       cin>>num;
       A.push_back(num);   
    }
    A.sort();
    //cout<<A.back()<<endl;
    for (int i =0; i<n ; i++)
    {
       int num = A.back();A.pop_back();   
       ans+= num* pow(2,i); 
    }
    cout<<ans;
    return 0;
}