November Challenge 2016
Chef and squares, Count Permutations, Task for Alexey
October Cook-Off 2016
Watson asks Does Permutation Exist, ChefWatson uses Social Network
March Challenge 2017
(CH) Bear and Sorted Rows, Bandwidth of a matrix, Bear and Extra Number, Xenny and Alternating Tasks, Cooking Schedule
April Challenge 2017
Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
May Challenge 2017
Chef and Subsequences, Median of adjacent maximum numbers, Courses in an university, Chef and his daily routine, Chef and Sub Array , Blocked websites
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Weasel does Xor on Tree, Fill The Matrix, Little Chef and Sums
October Challenge 2017
Chef and Magic Arrays, A Balanced Contest, Counter Test For CHEFSUM, Max Mex, Chef and a great voluntary Program
August Cook-Off 2017
Real obtuse, From heaven to earth
October Challenge 2019 Division 1
Chef and Maximum Star Value
India