Recently I was reading the Google Code Jam 2013 Qualification Round 2013 Contest Analysis written by Onufry Wojtaszczyk and David Arthur. In the section related to the Problem C Fair and Square, they said how if you generated the Fair and Square numbers with a generator, you should also include the code of the generator in your submission.
I was kind of surprise... so I decided to re-check the rules:
"A valid submission for a problem consists of (1) the output file generated by the contestant and (2) all source code the contestant used to generate that output file."
I was wondering who else forgot to include the generator in his code?