Hi all,

Croatian Olympiad in Informatics (COI) represents the first major step towards forming the Croatian IOI team. As you know, we usually hold an online mirror of this contest as the last round of the COCI season. Since this year is already unusual, we decided it was ok to postpone the online version of the contest until we have a (hopefully) stable version of the new judging system.

On that note, I'm happy to invite you to join us on Saturday, October 3, starting at 14:00 (GMT/UTC). The contest will feature 4 IOI-style tasks and it will last for 5 hours. You will also have full feedback with at most 50 submissions per task.

You can access the judging system here. The registration period ends 1 hour before the beginning of the contest (look it up under "Events"). If you wish to get a bit more familiar with the system, we have uploaded the last 14 COCI seasons for you to practice on. Most problems (except for the very easy ones) have English translations. Also, some custom checkers have been lost during the years so some problems might be wrongly judged, we will fix that along the way. In general, the more recent the season, the greater chance for the checkers to be correct. This judge will be used for the next COCI season.

The tasks were prepared by: tonkosi, abeker, paula, dpaleka, Shtef, ipaljak and mkisic.

Hope you'll enjoy the contest.