I am, Ramazan Rakhmatullin, the author of problems, while Lewin Gan is the tester and Marek Sommer is the secondary Tester. The editorialist is Paweł Kacprzak. Translators: Sergey Kulik(Russian), Hu Zecong (Mandarin) and VNOI team (Vietnamese).
There is no registration required, anybody with a CodeChef handle can participate. Top school participants can win CodeChef laddus (details on the contest page).
You will be provided 4 problems with subtasks (IOI-style grading).
Ties are broken by time of reaching your final score.
Remember about subtasks if you can’t solve a problem for the full score, and read the editorial after the contest.