Crack The Coding Interview Discussion

We will discuss specific solutions to "Crack the Coding Interview" questions.
Please attempt each problem before coming if you can (pick any language you want).

Please see the github for current problem set.
https://github.com/code-mentoring/ctci/tree/master

--- Upload your solutions by:

1. Forking this repo
   https://github.com/code-mentoring/ctci.git
2. Add your source files to the chapter folder
   ch#-SomeChapter/yourName_yourFile.ext
3. Submit pull request (someone will merge your changes)