August Challenge 2013
Splitting Candies, Little Elephant and Lemonade
August Challenge 2014
The Leaking Robot, Chef and Gift
November Challenge 2014
Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, The Spelling Problem
January Challenge 2015
Chef and Stones, Sereja and Votes
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
May Challenge 2015
Chef and Prime Divisors, Chef and new recipe, Set Difference
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
October Challenge 2015
Rupsa and Equilateral Triangle, Spheres, Who dares to be a millionaire, Count Subarrays, Time measure
May Cook-Off 2015
Devu and friendship testing
September Lunchtime 2015
Sum of palindromic numbers
September Challenge 2016
Chef and digits of a number, Faded Palindromes
India