#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
#define pb push_back
#define mp make_pair
#define N 1001
#define PI acos(-1.0)
#define M (ll)1e18

int main()
{
    vector<ll>v;
    ll n;
    cin>>n;
    for(ll i=0;i<n;i++)
    {
        ll a;
        cin>>a;
        v.pb(a);
    }

    sort(v.rbegin(),v.rend());

    ll res=0;

    for(ll i=0;i<n;i++)
    {
        res+=(ll)round(pow(2,i))*v[i];
    }

    cout<<res<<endl;

}