I've been chosen as one of the random 50 participants in the Raiffeisen round to win a t-shirt and a mug, but I got no idea how I will receive the prize. If anyone has won a prize from codeforces before or can help, I'll be thankful.

Tell us about the most fictitious or fun problem statement(s) you read (of course not necessarily solved). For me, perhaps they are 767A - Snacktower, 833B - The Bakery and 833C - Ever-Hungry Krakozyabra.