Hello everyone!

We are excited to announce that the International Invitational Math Optimization Challenge (IIMOC) 2025 has officially begun!

IIMOC is a month-long algorithmic optimization contest featuring a single NP-hard optimization problem, designed for competitive programmers, university teams, and advanced high-schoolers. This year’s edition already includes signups from MIT, HKUST, top IITs, and dozens of other universities and national Olympiad teams.

Contest dates: November 22 – December 21, 2025

Signups remain open throughout the competition. You can register anytime at https://iimoc.org — the process is quick and requires no verification. We encourage new teams to join; most teams haven’t submitted yet, and losing a few days makes very little difference in an optimization-style contest.

We hope your heuristics converge faster than the submission deadline!

EDIT: Contest ends December 21, 9:00PM PST exactly.