#include "bits/stdc++.h"
using namespace std;
typedef unsigned long long ull;
typedef long long int ll;
typedef vector<long long int> vi;
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
    ll n,sum=0,count=0,m,flag=0,ans=0,k;
    cin>>n;
    vi v;
    for(int i=0;i<n;i++)
    {
        ll x;
        cin>>x;
        v.push_back(x);
    }
    sort(v.rbegin(),v.rend());
    for(int i=0;i<n;i++)
    {
        count=pow(2,i)*v[i]+count;
       // cout<<count<<endl;
    }
    cout<<count;
    return 0;
}


/* freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
 */