September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
March Cook-Off 2016
Alternating subarray prefix
June Challenge 2017
A Good Set, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, Whats in the Name
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
November Challenge 2018 Division 2
Chef and Difficult Contests
Bangladesh