This project is created, because many people are appreciating the wonderful cheat sheet written by NTU-FSM, and they want to have a longer version of it.
However, a long cheat sheet can no longer be considered as a cheat sheet. So the repository icpc21days (Prepare ACM-ICPC in 21 days) is created.
This project is likely to be composed into a book. Wooo, yes, a book....