I've never seen such an educational problem like 1287C - Garland before.
UPD: Fixed now.
UPD2: Though it's obvious, I hope no one would think it's done by me. I only reported it. (Seems that I got some downvotes?)
A wonderful problem that covers almost all topics
I've never seen such an educational problem like 1287C - Garland before.
UPD: Fixed now.
UPD2: Though it's obvious, I hope no one would think it's done by me. I only reported it. (Seems that I got some downvotes?)