Problems from Baltic Olympiad in Informatics 2017, Day 2

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Cat in a tree	0.04	639	158	106	67%	6.8Hard	en
Friends	0.00	598	40	25	62%	7.2Hard	en
Plus Minus	0.03	433	100	84	84%	5.2Medium	en