October Challenge 2014
Chef and Ground, Magical Girl and Colored Liquid Potions
January Challenge 2015
Queries on the String, 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 Equality, Let us play with rank list, Chef and Chain
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Inversion sorting, Division of Lands, Chef and Piano Scales
September Challenge 2015
Lighthouses, Bank robbery, Count Steps in Matrix, Chain of Doughnuts, Nikitosh and xor
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
December Challenge 2015
Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence
May Cook-Off 2015
Devu and friendship testing, Devu and decorating birthday cake
June Cook-Off 2015
Strange operations, Longest non regular parentheses sub-sequence
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
August Challenge 2016
Chef and Circle Run, Chef and Chocolate, Chef and Round Run
India