#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 */  
    int n;
    cin>>n;
    vector<int> v;
    for(int i=0;i<n;i++)
    {
      int x;
        cin>>x;
        v.push_back(x);
    }
    sort(v.begin(),v.end());
    long long ans=0;
    int j=0;
    for(int i=n-1;i>=0;i--)
    {
       ans = ans + 1LL*v[i]*pow(2,j);
        j++;
    }
    cout<<ans;
    return 0;
}