We would like to invite you to CEOI 2024 online mirror, which will take place between Sunday, June 30 at 20:00 UTC and Monday, July 15 at 6:00 UTC. Please do not discuss the tasks until the end of the mirror in order not to spoil the tasks for others.

To participate in the contest, go to the contest system, register and then log in. You can solve any tasks in any order you like during the entire contest period.

The problems were prepared by Svizel_pritula, Dakto, David Kolář, MapleTree314, Yongaron, JiriKalvoda, osladky, rakdver, timreizin, -Wave- and me.

Lot of thanks goes to:

• JiriKalvoda for heavy lifting as the Head of SC.
• HaroldVemeno, Dakto and merlin_wizard for testing the competition.
• Martin Mareš and Jan Hadrava for herding the computers and running the contest system.
• Tom Pitner and local organizers for running the event
• And finally, all contestants and team leaders for the great atmosphere!

Update: You can find editorials and other task materials here.