Err.. I'm sorry for Tebak_Siapa_Aku, the official announcement is late, but here is it, just a couple of minutes after you posted the unofficial here :')

Hello everyone! :D

Indonesia will hold 2016 National Olympiad in Informatics this week (May 16th — May 18th 2015) in Palembang, Indonesia. The contest consists of three separated contests:

• Day 0 (Practice Contest): Monday, May 16th 14.00 — 17.00 (UTC +7)
• Day 1: Tuesday, May 17th 08.30 — 13.30 (UTC +7)
• Day 2: Wednesday, May 18th 08.30 — 13.30 (UTC +7)

And this is the second year for Indonesia (last year events : here) to invite everyone around the world to try solving the problems by participating the Open Contest! The Open Contest will be held in https://competition.ia-toki.org/.

There will be three different contests, one for each day. You may participate them separately (e.g. only participate in Day 1 and Day 2, but not in Day 0), but we expect you to join them all. Unlike last year, they are not virtual contests. The Open Contest will start after an hour from the real contest. Here are the schedule and details for the Open Contest:

• Day 0 (Practice Contest): Monday, May 16th 15.30 — 17.30 (UTC +7). Register here.
• Day 1: Tuesday, May 17th 09.30 — 14.30 (UTC +7). Register here.
• Day 2: Wednesday, May 18th 09.30 — 14.30 (UTC +7). Register here.

Registrations are open until the start of each contests.

Several notes:

• No medals/certificates will be awarded to Open Contest participants.
• Each contest will have 3 IOI-styled problems.
• Problem statements will be provided in English and Indonesia.
• There is a submission limit of 30 for each problem.

We hope you will find many interesting problems here. Good luck and thanks for your participation! :D

Indonesian National Olympiad in Informatics Committee