January Challenge 2017
Cats and Dogs, Chef and Circle, Digits Cannot Separate, Reservior, Tourists in Mancunia, Capital Movement
February Challenge 2017
Chef and Triangles, Gerrymander, Most Frequent Element, Chef and His Apartment Dues, Chef and his Best Friend, Interval Game, Eugene and big number, Chef and Yoda
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
Russia