January Challenge 2015
Chef and Stones, Chef and A Large Permutation, Gcd Queries, Sereja and Votes, One Dimensional Kingdoms
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Chef and Equality
March Challenge 2015
Chef and Notebooks, Sign Wave
April Challenge 2015
Broken Telephone, Chef and Piano Scales, Chef and Interview
May Challenge 2015
Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Chef and Cube, Na2a and lucky stone, Sereja and Game 2, Addition and Multiplication, Bread
December Challenge 2015
Chef and the stones, Plane Division
May Cook-Off 2015
Devu and friendship testing, Devu and decorating birthday cake
July Cook-Off 2015
Cops and the Thief Devu, Maximize Disjoint Pair Sum
July Lunchtime 2015
Greedy puppy, Puppy and game, Puppy and cats
May Challenge 2016
Forest Gathering, Chef and Big Soccer
June Challenge 2016
Chef And The Hiring Event, Chef and Rectangle Array, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game
September Lunchtime 2017
Chef and Cook-Off Contests
India