Google Foo Bar
Google Foo Bar is Google's secret recruiting process embedded within their search engine. There are 5 levels, each with a different number of challenges that follow a story.
Checkout journal.md for the overall story with each level.
Inside each level is a challenge folder with a problem file describing the challenge and constraints, and my solution to the challenge.
At this point, I was offered to send my solutions to a Google recruiter. Checkout the questionnaire.md for details.