Problems from Baltic Olympiad in Informatics 2017, Day 2

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Cat in a tree 507 117 23% 0.04 114 79 69% 6.7
Friends 110 14 13% 0.04 25 11 44% 7.8
Plus Minus 399 119 30% 0.03 95 76 80% 4.8