Hello Codeforces,
You might remember me as the author of Pinely Round 4 (Div. 1 + Div. 2).
Today, I invite you to participate in IIMOC 2025, a month-long heuristic contest starting soon.
About the Problem
I authored the official problem for this contest, and I am very fond of it. The problem is designed to be easy to approach but extremely difficult to master.
Good Skill Differentiation: Whether you are a beginner or an expert, the problem will challenge you appropriately.
High Quality Tests: I tuned the test data to ensure the tests are strong and the grading is fast.
If you enjoy AtCoder Heuristic Contests, you will definitely enjoy this challenge.
Contest Info
Timeline: Nov 22, 2025 — Dec 21, 2025.
Divisions: While the main contest is for high school students, we have an Observer Division for university students and others.
Prizes: Top teams (including Observers) will receive T-shirts.
Registration
Click here to Register (Google Form)
(Note: If you are not a high school student, please enter "observer" in the "Country" field.)
See you on the leaderboard!
As a tester and organizer, can confirm the problem is interesting.
Hello! How/where can we confirm that we signed up and input who our teammates are?
Hi, I'm the organizer so I'll respond on behalf of ZhouShang2003. You don't need to input who your teammates are, we only need this if you guys win an award. If you filled out the google form you will receive communications near the contest date.
Could you specify what is meant by 'top teams'? I mean, how many teams will be eligible to receive a prize?
There are two divisions: HS and College+, #1 teams will receive T-shirts and a trophy. Other recognitions are based off of percentile and we will announce the cutoff once the contest ends.
See you all tomorrow! Good luck!