Problems from Baltic Olympiad in Informatics 2017, Day 2

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Cat in a tree	0.04	639	550	133	24%	6.8Hard	en
Friends	0.01	598	430	83	19%	6.3Hard	en
Plus Minus	0.03	589	356	109	31%	5.0Medium	en