December Challenge 2014
Chef and Apple Trees, Alok-nath and His Sanskars
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
May Challenge 2015
Set Difference , Chef and new recipe
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire
December Challenge 2015
Chef and the stones, Plane Division
March Challenge 2016
Palindromic substrings, Chef And Special Dishes, maximize the sum
March Cook-Off 2016
Digital clock, Alternating subarray prefix
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
India