&quot;Credentials: We&#x27;re ex-Googlers and trained computer scientists. We invert binary trees [links to <a href="https:&#x2F;&#x2F;twitter.com&#x2F;mxcl&#x2F;status&#x2F;608682016205344768" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;mxcl&#x2F;status&#x2F;608682016205344768</a> ] for fun.&quot;<p>Wow, way to ensure I am never, ever going to recommend this service to anyone. I am not impressed they can invert a binary tree. What is impressive is how they can manage to come across as pretentious, try-hard bullies in their own effing marketing material.