March Challenge 2017
Xenny and Alternating Tasks
October Challenge 2017
(Challenge) Connecting computers
November Challenge 2017
Chef and Intersection Line, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
July Cook-Off 2017
Chang and the Perfect Function
September Cook-Off 2017
Subsequence Equality, Statistics Construction
October Cook-Off 2017
Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries
November Cook-Off 2017
Skiing, Online Chess, Random Pair
September Lunchtime 2017
Chef and Cook-Off Contests
India