Japanese version is available here.
Online Contest will start in 10:00(JST),01:00(UTC/GMT). Sorry for late.
The 17th Japanese Olympiad in Informatics Final Round Online Contest is the online contest of The 17th Japanese Olympiad in Informatics Final Round. The contest is open to everybody. Everybody is welcome to attend JOI Open Contest!
The duration of the contest is 4 hours.
Registration will be open before each contest. A link to the registration page will appear on this page about 30 minutes before the beginning of the contest. Contestants can register on the contest site by themselves from the right before the beginning of each contest until the end of it.
No prizes will be given to the contestants. We will not publish the source code submitted to this contest without permission from the participants.
After the contest finishes, we will open the judging server for one week. Interested contestants can improve and resubmit their solutions by themselves.
Rules that are same as JOI 2018 Rule:
Rules that are not same as JOI 2018 Rule:
Tasks and test data are available after the contest.