#include<bits/stdc++.h>
#define cin(a) cin>>a;
#define cout(a) cout<<a;
#define new() cout<<endl;
#define pb push_back;
#define loop(i,x,n) for(int i=x;i<n;i++)
#define TC() ll t;cin>>t;while(t--)
typedef long long ll; 
#define MOD 1000000007 ;
using namespace std;
int main()
{
    ll ans=0;
   int n;
    cin(n);
    int a[n];
    for(int i=0;i<n;i++){
        cin(a[i]);
        
    }
    sort(a,a+n);
    for(int i=n-1;i>=0;i--)
        {
        ans=ans+pow(2,n-i-1)*a[i];
    }
    cout(ans);
   return 0;
}