#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define make0(a) memset(a,0,sizeof(a))
#define make1(a) memset(a,-1,sizeof(a))
#define all(v) v.begin(),v.end()
#define sc(i) scanf("%d",&i)
#define pi pair <int,int>
#define fast_cin() ios_base::sync_with_stdio(0) 

const int mod = 1e9+7;

int main()
{
	int N;
	cin >> N;
	ll A[N];
	for(int i=0;i<N;i++)
		cin >> A[i];
	sort(A,A+N);
	reverse(A,A+N);
	ll ans = 0;
	for(int i=0;i<N;i++)
	{
		ans += pow(2,i)*A[i];
	}	
	cout << ans << endl;
	return 0;
}