What are the "rules" of these problems? Are you allowed to use calculators and programming? Or should the solutions be pencil and paper only Olympiad-style?
Huh, looks like I'm one of today's lucky 10,000
https://xkcd.com/356/
What are the "rules" of these problems? Are you allowed to use calculators and programming? Or should the solutions be pencil and paper only Olympiad-style?