Hi Codeforces community! :D

We're excited to invite you to TOKI OSN Open Contest 2018 -- an online mirror contest for Indonesia 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).

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

• Day 0: 2 July 2018 08:35 — 23:05 UTC (trial session)
• Day 1: 3 July 2018 02:35 — 23:05 UTC
• Day 2: 4 July 2018 02:35 — 23:05 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 any time within the time range, by clicking a provided timer button.

All three contests are now available on TLX (https://tlx.toki.id/competition). Please register in those contests. You may need to register for a TLX account if you do not have one already. (Note the new url -- we've got a brand new revamped UI for TLX!)

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

See you in the leaderboard! ;)

// P.S.: link to the previous year's contest blogpost can be found here.

UPD: The post-contest information is available here.