//	Author: Niraj vadhaiya
		#include<bits/stdc++.h>
		using namespace std;
		#define mod 1000000007
		#define pb push_back
		#define ll long long
		#define mp make_pair
		int main()
		{
			int w=0;
			if(w)
			{
				freopen("C:/Users/gold/Desktop/sublime IO/input.txt","r",stdin);
    			freopen("C:/Users/gold/Desktop/sublime IO/output.txt","w",stdout);
    		}	
    		int n;
    		cin>>n;
    		int p[n];
    		for(int i=0;i<n;i++)
    			cin>>p[i];	
			sort(p,p+n);
			ll an=0;
            int j=0;
			for(int i=n-1;i>=0;i--)
			{
                //cout<<(p[i]*pow(2,i))<<endl;
				an+=(p[i]*pow(2,j++));
			}
			cout<<an;
			return 0;
		}