The 21th Japanese Olympiad in Informatics Final Round Online Contest

Overview

Japanese version is available here.

The 21th Japanese Olympiad in Informatics Final Round Online Contest is the online contest of The 21th Japanese Olympiad in Informatics Final Round. The contest is open to everybody.

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.

Contest Information

Name: The 21th Japanese Olympiad in Informatics Online Contest
Contest System: CMS (customized version)
Contest duration: 4 hours
The number of tasks: 5 tasks
Language: English, Japanese
Date: Sunday, February 13, 2022; 16:00 - 20:00 +0900 (JST); 07:00 - 11:00 (UTC/GMT)

Rule

Rules that are the same as The 21th Japanese Olympiad in Informatics Final Round Rule:

All submissions will receive full feedback.
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++17).
You cannot use C, Pascal nor Java.
You may need to write I/O code by yourself. Graders are not provided for all tasks.

Rules that are the different from The 21th Japanese Olympiad in Informatics Final Round Rule:

Question form is available on a contest server, but no replies are guaranteed.
You can use CPython and PyPy experimentally in adition to C++. However, each task is optimized for C++, so you may not be able to gain points even though you implement the correct algorithm in Python.

Contest Site

The contest is over.

Ranking

Ranking

Task statements and dataset

Task statements and dataset are available in JOI 2021/2022 本選問題・データ (Japanese).