TUYMAADA 2018 J2
The text of this problem is not here. Read it in the official paper below.
Official text Tuymaada Olympiad 2018 official paper, page 1. Quoted with source.
Also TUYMAADA 2018 Problem 2.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.