December Challenge 2015
Oracle Devu and Longest Common Subsequence, Chef and the stones
September Lunchtime 2015
Sum of palindromic numbers
March Challenge 2016
Palindromic substrings, maximize the sum
June Challenge 2016
Devu and an Array, Chef and Coins Game, Chef and Array and K, Chef And The Hiring Event, Chef And Binary Operation
July Challenge 2016
Andrash and Stipendium, Chef and Tetris, Chefland and Electricity
January Challenge 2017
Capital Movement, Cats and Dogs
December Cook-Off 2020 Division 2
Self-Destructing Strings, Catch the Thief, Minimum Attendance Requirement
December Lunchtime 2020 Division 2 (Unrated)
Three Letters, Sed Sequences, One Zero Swaps
India