The 24th Japanese Olympiad in Informatics Spring Training Online Contest

Overview

Japanese version is available here.

The 24th Japanese Olympiad in Informatics Spring Training Online Contest is the online contest of The 24th Japanese Olympiad in Informatics Spring Training. The contest is open to everybody.

The secries of the contests will be held in 4 days. The duration of each contest is 5 hours. You can choose start time from the specified range freely.

No prizes will be given to the contestants. Live scoreboard will be provided during the contest. The ranking including the contestants’ usernames and scores of each task will be published here after the contest.

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.

There is no online contest of The 5th Japanese Olympiad in Informatics for Girls Spring Training.

Contest Information

Name: The 24th Japanese Olympiad in Informatics Spring Training Online Contest
Contest System: CMS (customized version)
Contest duration: 5 hours per day
The number of tasks: 3 - 4 tasks per day
Language: English, Japanese
Date: March 21, 2025 to March 24, 2025
Time: 11:00-09:00 the next day +0900 (JST); 02:00-00:00 the next day (UTC/GMT); You can choose start time from above freely.; Duration is 5 hours.; However, if you start competing after 19:00 (UTC/GMT), competition ends at 00:00 (UTC/GMT) and duration is less than 5 hours.

Rule

Rules that are the same as The 24th Japanese Olympiad in Informatics Spring Training Rule:

All submissions will receive full feedback in principle.
Contestants may submit at most once per task per minute.
Contestants may submit at most 50 times per task.
Each submitted source code must be written in C++ (C++20).
You cannot use C, Pascal nor Java.
You may need to write I/O code by yourself. Graders may not be provided for all tasks.

Rules that are the different from The 24th Japanese Olympiad in Informatics Spring Training Rule:

Question form is available on a contest server, but no replies are guaranteed. In particular, questions submitted after 7:00 (UTC/GMT) are not likely to be answered.

Contest Site

Contest site including registration form and live scoreboard will be open at least 10 minutes before the contest starts.