The unexpectedly hard windmill question
The unexpectedly hard windmill question
#IMO #Problem
The famous (infamous?) « windmill » problem on the 2011 IMO
The author of this problem was Geoff Smith. You can find the full list of problems considered for the IMO that year, together with their solutions, here: https://www.imo-official.org/problems…
You can find data for past IMO results here: https://www.imo-official.org/