#include<bits/stdc++.h>
using namespace std;
int main(){
	long long n,m,sum=0;

cin>>n;
vector<long long > v(n);	
	for(int i=0;i<n;i++)
	cin>>v[i];
	std::sort(v.begin(), v.end(), std::greater<long long>());
	for(int i=0;i<n;i++){
		sum+=v[i]*(long long)pow(2,i);
	}
		cout<<(long long)sum;
		
	
//cout<<endl;}
	return 0;
}