The unexpectedly hard windmill question (2011 IMO, Q2)

3Blue1Brown

The famous (infamous?) "windmill" problem on the 2011 IMO Help fund future projects:   / 3blue1brown   An equally valuable form of support is to simply share some of the videos. Special thanks to these supporters: http://3b1b.co/windmillthanks Home page: https://www.3blue1brown.com The author of th