November Challenge 2014
Distinct Characters Subsequence, Let us construct palindrome, Chef and Segment Game
February Challenge 2015
Chef and Chain, Chef and Equality
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
August Cook-Off 2015
Chef and the Wildcard Matching
July Lunchtime 2015
Puppy and game, Greedy puppy
February Challenge 2016
Chef and Strange Operations, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
June Challenge 2016
Chef And The Hiring Event, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
India