October Challenge 2016
Chef and Keyboard, Sereja and Progressions, Chef and Two String, Chef and Three Dogs, Fenwick Iterations
March Challenge 2017
Cooking Schedule, Xenny and Alternating Tasks, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix
April Challenge 2017
(CH) Serejs and Billiards, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
May Challenge 2017
Chef and Battleship, Median of adjacent maximum numbers, Courses in an university, Chef and his daily routine, Chef and Sub Array , Blocked websites
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets
September Challenge 2017
Minimum Good Permutation, Little Chef and Sums, Fill The Matrix, Chef and Pick Digit, Sereja and Commands
October Challenge 2017
Max Mex, A Balanced Contest
October Cook-Off 2017
Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries
United States