Comment Comment by sudeepj My bad. I based on the tweet from the author himself [1]May be he meant to use "invert binary tree" as a representative example of questions that typically asked.[1] https://twitter.com/mxcl/status/608682016205344768?lang=en parent sudeepj 5 years ago
May be he meant to use "invert binary tree" as a representative example of questions that typically asked.
[1] https://twitter.com/mxcl/status/608682016205344768?lang=en