Christmas Trees - Christmas Special Contest
posted on Dec. 25, 2014, 6:05 p.m. 4Do you find yourself with nothing to do even on December 25?
and have prepared a contest for this day. The contest will last for 4 days, and there are 3 problems in total.
The theme is about trees. If you like trees or want to learn more about graph theory, you should check out this contest.