September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
November Challenge 2015
Eugene and function, Chef and cakes
August Cook-Off 2015
Chef and the Wildcard Matching
September Lunchtime 2015
Sum of palindromic numbers
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
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
India