#include<bits/stdc++.h>
using namespace std;


#define  ll long long
#define fr(a,n) for(int i=a;i<n;i++)

#define in(x) cin>>x;
#define ot(x) cout<<x<<endl;
#define pb(x) push_back(x);



#define swap(a,b) {a=a^b;b=a^b;a=a^b;}
#define sort(v) sort(v.begin(),v.end())

#define mx INT_MAX;
#define mod 1e+7;
vector<ll> v;
vector<ll> arr;
vector<pair<ll,ll> > ma;
int main()
{
    int n,m;
    cin>>n;
    v.resize(n);
    fr(0,n)in(v[i]);
    sort(v);
    long long ans=0;
    long long  x=1;
    for(int i=n-1;i>-1;i--)
    {
        ans=ans+(x*v[i]);
        x=x*2;
    }
    cout<<ans;


}