September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
December Challenge 2017
Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
October Cook-Off 2017
Chef and Employment Test, Chef and Weird Queries
November Cook-Off 2017
Online Chess, Random Pair
February Challenge 2018
Chef And His Characters, Chef And The Patents, Permutation and Palindrome
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove
India