January Challenge 2015
Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Let us play with rank list, Chef and Equality
May Challenge 2015
Chef and Cake, Chef and new recipe, Chef and Prime Divisors, Devu and binary String, Set Difference
June Challenge 2015
Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons
May Cook-Off 2015
Devu and decorating birthday cake, Devu and friendship testing
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
July Cook-Off 2016
Chef and Proportion, Chef and Numbers
India