#include <bits/stdc++.h>
using namespace std;

int main(int argc, char const *argv[])
{
	long N;
	cin>>N;
	// std::vector<long> a;
	long v[N];
	for (int i = 0; i < N; ++i)
	{
		cin>>v[i];
	}
	sort(v,v+N);
	reverse(v,v+N);
	long long sum = 0;
	for (long i = 0; i < N; ++i)
	{
		sum += v[i]*pow(2,i);
	}
	cout<<sum<<"\n";
	return 0;
}