October Challenge 2015
Who dares to be a millionaire, Count Subarrays
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
June Challenge 2016
Chef and Coins Game, Devu and an Array, Chef And Binary Operation
February Challenge 2017
Chef and His Apartment Dues
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
India