November Challenge 2014
Distinct Characters Subsequence, Let us construct palindrome
January Challenge 2015
Chef and A Large Permutation, Chef and Stones, Sereja and Votes
February Challenge 2015
Chef and Equality, Let us play with rank list, Chef and Chain
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
May Challenge 2015
Set Difference , Chef and new recipe
April Cook-Off 2015
Equality, Version Control System
India