Dear all,
JOI Open Contest 2025 is an IOI-like open competition for students at
schools for secondary education. The main purpose of this contest is
to give Japanese delegations and candidates of delegations
an opportunity for training and practice. But the contest itself is
open to everybody.
Everybody is welcome to attend JOI Open Contest 2025!
This year, the contest will be held during June 15-16, 2025.
There will be 3 tasks.
Each submitted source program must be written in C++ (C++20).
Problem statements will be provided both in Japanese and English.
The duration of the contest is 5 hours.
The contest server will be open during
Sunday, June 15, 2025 04:00 - Monday, June 16, 2025 04:00 (UTC/GMT).
Contestants can choose start time from above freely.
After the contest finishes, we will open the judging server for one week.
Interested contestants can improve and resubmit their solutions
by themselves.
After the contest finishes, we will fix the standings.
No prizes will be given to the contestants.
Contest website:
https://contests.ioi-jp.org/open-2025/index.html
Contest duration: 5 hours
The number of tasks: 3 tasks
Language: English, Japanese
Programming Language: C++ (C++20)
Details will be announced on the contest website.
Date & Time:
Sunday, June 15, 2025 13:00 - Monday, June 16, 2025 13:00 +0900 (JST)
Sunday, June 15, 2025 04:00 - Monday, June 16, 2025 04:00 (UTC/GMT)
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Executive director of the Japanese Committee for the IOI
Seiichi Tani
Chairperson of the Scientific Committee of JCIOI
Tetsushi Ito