November Challenge 2014
Chef and Red Black Tree, Distinct Characters Subsequence
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
April Challenge 2015
Chef and Interview, Broken Telephone
August Challenge 2015
Devu And Churu , Aditi and Magic Trick, Cooking Machine, Gravity Guy, Way Out
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
September Lunchtime 2015
Sum of palindromic numbers
March Challenge 2016
Palindromic substrings, maximize the sum
July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
India