#include <bits/stdc++.h>
#define ll long long 
#define m 1000000007
using namespace std;

int main() {
	// your code goes here
	std::ios::sync_with_stdio(false);
	ll a[41],ans=0,n,i;
	cin>>n;
	for(i=0;i<n;i++)
	cin>>a[i];
	sort(a,a+n);
	
	for(i=n-1;i>=0;i--)
	ans+=(pow(2,n-i-1)*a[i]);
	cout<<ans;

	
	return 0;
}