User contributions
- 21:30, 30 June 2020 (diff | hist) . . (+115) . . Olympiad books (→Geometry)
- 20:23, 21 June 2020 (diff | hist) . . (+674) . . N 2020 USOJMO Problems/Problem 1 (Created page with "Let <math>n \geq 2</math> be an integer. Carl has <math>n</math> books arranged on a bookshelf. Each book has a height and a width. No two books have the same height, and no t...")
