Setters: Errichto, gainullin.ildar, and big help from PraveenDhinwa. Main tester: lewin. Editorials: mgch. Translators: gainullin.ildar (Russian), huzecong (Mandarin) and VNOI team (Vietnamese). Language verification: arjunarul.
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. The contest should be a bit easier than a Div1 Codeforces round. Remember about subtasks if you can't solve a problem for the full score, and read the editorial after the contest.
I wish you great fun and no frustrating bugs. Hope to see a lot of you on the leaderboard!