#include<bits/stdc++.h>
#define ll long int
using namespace std;
int main()
    {
    ll n;
    cin>>n;
    vector<ll> arr;
    for(int i=0;i<n;i++)
        {
        ll x;
        cin>>x;
        arr.push_back(x);
    }
    sort(arr.begin(),arr.end(),greater<ll>());
    ll sum=0;
    for(int i=0;i<n;i++)
        {
        sum+=pow(2,i)*arr[i];
    }
    cout<<sum;
    return 0;
}