November Challenge 2014
Chef and Segment Game, Let us construct palindrome, Chef and Red Black Tree, Distinct Characters Subsequence
January Challenge 2015
Sereja and Number Division 2, Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
February Challenge 2015
Chef and Chain, Chef and Equality
March Challenge 2015
Chef and Notebooks, Sign Wave
April Challenge 2015
Chef and Piano Scales, Broken Telephone, Count Sequences, Chef and Interview
May Challenge 2015
Set Difference , Chef and new recipe
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
September Challenge 2015
Lighthouses, Cracking the Code, Bank robbery, Count Steps in Matrix, Chain of Doughnuts
October Challenge 2015
Count Subarrays, Who dares to be a millionaire, Rupsa and Equilateral Triangle
October Cook-Off 2015
Almost Sorted Permutation
January Long Challenge 2016
Churu and Balls, Chef and Time Machine, Devu and Perfume
India