#include<bits/stdc++.h>
using namespace std;
 
#define  MOD   1000000007
#define  EPS   1e-2
#define  X     first
#define  Y     second
#define  N     2005
#define  sc    scanf
#define  pf    prinf
#define  pb    push_back
#define  ll   long long
#define  LN    20
 
 
 
#define iosbase  ios_base::sync_with_stdio(false)
#define dbg(x)   cout<<#x<<"="<<x<<endl

ll a[N];
int main() {

      ll n;
      cin>>n;
      for(int i=0;i<n;i++)
            cin>>a[i];

      sort(a,a+n);
      reverse(a,a+n);
      ll po=1;
      ll ans=0;
      for(int i=0;i<n;i++){
            ans=(ans+po*a[i]);
            po=po*2;
      }
      cout<<ans<<endl;
}