September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
January Challenge 2017
Capital Movement, Cats and Dogs
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues, Gerrymander
May Challenge 2017
Blocked websites, Chef and Subsequences, Median of adjacent maximum numbers, Courses in an university, Chef and his daily routine, Chef and Sub Array
June Challenge 2017
Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
December Challenge 2021 Division 2 (Unrated)
Valleys and Hills, Rock Paper Scissors, Pyramid Traversal, List of Lists
India