#include<bits/stdc++.h>
#include<vector>
#include<set>
#include<stack>
#include<queue>
#include<list>
#include<map>
#define ll long long
#define INF 2000000000
#define NINF -2000000000
#define MOD 1000000007
#define br '\n'
using namespace std;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	//freopen("input.txt","r",stdin);
	//freopen("output.txt","w",stdout);
	ll n;
	cin>>n;
	ll a[n];
	for(int i=0;i<n;i++)
	{
		cin>>a[i];
	}
	sort(a,a+n);
	ll pow2=1,ans=0;
	for(int i=n-1;i>=0;i--)
	{
		ans=(ans+pow2*a[i]);
		pow2=pow2*2;
	}
	cout<<ans<<br;
	return 0;
}