#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	vector<int> c;
	cin>>n;
	for(int i=0;i<n;i++)
	{
		long long int v;
		cin>>v;
		c.push_back(v);
	}
	sort(c.begin(),c.end());
	long long int total = 0;
	for(int i=n-1;i>=0;i--)
		total+=(c[i] * pow(2,n-1-i));
	cout<<total<<endl;
	return 0;
}