#include<bits/stdc++.h>
using namespace std; 
#define ll long long int
#define dbl double
#define si set<int>
#define vi vector<int>
#define vii vector<string>
#define mii map<int,int>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pff pair<double,double>
#define fr(i,n) for(int i=0;i<n;i++)
#define mxx 100001
#define mmm 201
#define mymod 1000000007
#define pcal 1e-5
int main()
{
    clock_t tstart = clock();
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    //cout<<fixed<<setprecision(2);
    int n;
    cin>>n;
    int arr[n];
    fr(i,n)
    cin>>arr[i];
    sort(arr,arr+n);
    ll ans = 0;
    for(int i=n-1;i>=0;i--)
    {
      ans = ans + arr[i]*pow(2,n-i-1);
      //cout<<ans<<"\n";
    }
    cout<<ans;
   // cout<<"\n\nTotal Time Taken : "<<(double)(-tstart + clock())/CLOCKS_PER_SEC<<"sec\n\n";
    return 0;
}