#include "bits/stdc++.h"
using namespace std;
int main()
{
	long long int n;
	scanf("%lld",&n);
	long long temp;
	long long ans=0;
	std::vector<long long> v;
	for (int i = 0; i < n; ++i)
	{
		scanf("%lld",&temp);
		v.push_back(temp);
		
	}
	sort(v.begin(),v.end(),greater<long long>());
	for (int i = 0; i < n; ++i)
	{
		ans+=(v[i])*(1LL<<i);
	}
	printf("%lld\n",ans);


	return 0;
}