September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
August Long Challenge 2017
Palindromic Game, Greedy Candidates, Chef and Mover, Chef and Rainbow Array
December Challenge 2017
Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
September Cook-Off 2017
Statistics Construction, Subsequence Equality
India