#include<bits/stdc++.h>
using namespace std;

#define ll long long int
#define mod 1000000007
#define pi pair<int,int>

ll power(ll a, ll b)
{
	if(b==0)
		return 1;
	if(b==1)
		return a;
	ll temp = power(a, b/2);
	temp = (temp*temp);
	if(b&1)
		return (a*temp);
	return temp;
}

int main()
{
    int n;
    cin>>n;

    int a[n];
    for( int i=0;i<n;i++ )
    {
        cin>>a[i];
    }

    sort( a,a+n,greater<int>() );

    ll ans=0;

    for( int i=0;i<n;i++ )
    {
        ll x = a[i]*power(2,i);

        ans += x;
    }

    cout<<ans<<endl;

    return 0;
}