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IOI 2025 will be hosted by Bolivia. Visit the official website to learn more.

Coming soon   IOI 2025 in Bolivia

JOI Spring Training Contest 2025

March 17th, 2025 in Competitions

Hello Everyone! 
Japanese Olympiad in Informatics Spring Training Online Contest 2025 will be held from March 21 to March 24, 2025.

Online Contest site:
https://contests.ioi-jp.org/joi-sp-2025/index-en.html


The duration of the contest is 5 hours.
You can choose start time from specified range freely.


There are 3 or 4 problems in each day.
Problem statements will be provided both in Japanese and English.
There might be unusual tasks such as output-only tasks, optimization tasks, reactive tasks and communication tasks, just like International Olympiad in Informatics (IOI).


Details are available in the contest information page.
We welcome all participants. Good luck and have fun!


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Executive director of the Japanese Committee for the IOI
Seiichi Tani

Chairperson of the Scientific Committee of JCIOI
Tetsushi Ito

In other news:

Need more info?

Beginners

Not sure where to go? Click here to view some basic information on how to learn programming and prepare to win a medal at the IOI.

Statistics

A couple of volunteers maintain a separate page with stats about people who participated at the International Olympiad in Informatics.

Journal

The IOI publishes a journal every year, with original high-quality scientific papers related to education, contests and algorithms.

About

The IOI is one of five international science olympiads. The primary goal of the IOI is to stimulate interest in informatics (computing science) and information technology.

Another important goal is to bring together exceptionally talented pupils from various countries and to have them share scientific and cultural experiences.

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