Invitation to TOKI Indonesian NOI Open Contest 2022

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Hello Codeforces community,

We are excited to invite you to TOKI Indonesian NOI Open Contest 2022 — an online mirror contest for the Indonesian National Olympiad in Informatics. This national olympiad is one of the stages required for our students to qualify to represent Indonesia in the International Olympiad in Informatics (IOI). You may have seen our past open olympiads (2015, 2016, 2017, 2018, 2019, 2020, 2021), and you can check our past problems here.

The contest is similar to IOI: 2 competition days (+ 1 trial session), each consisting of 3 IOI-style (partial, subtasks) problems to be solved in 5 hours. The schedule is as follows:

Day 0: 3 October 2022 03:30 — 4 October 2022 01:30 UTC (trial session)
Day 1: 4 October 2022 06:30 — 5 October 2022 01:30 UTC
Day 2: 5 October 2022 06:30 — 6 October 2022 01:30 UTC

Each contestant can select any 5-hour window within the time range to do the contest for each competition day. Each contestant may start the contest at any time within the time range by clicking the "start" button. There will be no additional time given if a contestant starts the contest less than 5 hours before the contest ends. The scoreboard will be hidden until the contest has ended.

All three contests are now available on TLX. Please register in those contests. You may need to register for a TLX account if you do not have one.

For more detailed information and rules, see our official website.

See you on the leaderboard!

UPD: The official contest has ended, thanks for your participation!

Congratulations to errorgorn for winning the contest! The result of the open contest can be found on our website.

You can upsolve the problems here. The editorials can be found in the contest link or upsolve link.

If you'd like to give feedback to the contest, you may submit a response in this form.

We thank everyone who is involved:

Scientific Committee: AMnu, steven.novaryo, faustaadp, rama_pang, Pyqe, Mushthofa
Technical Committee: fushar, faishol27, Samuel
Authors: rama_pang, Pyqe, Mushthofa
Tester: nirvana

We hope we can conduct the open OI again, and see you next year!

Rev.	By	When	Δ	Comment
en6	rama_pang	2022-10-19 03:09:20	1011	post-contest update
en5	rama_pang	2022-09-28 15:26:45	0	(published)
en4	rama_pang	2022-09-28 15:21:39	72
en3	rama_pang	2022-09-28 15:16:22	13
en2	rama_pang	2022-09-28 15:07:55	42
en1	rama_pang	2022-09-28 15:03:34	2375	Initial revision (saved to drafts)

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en6