May Challenge 2015
Chef and Prime Divisors, Set Difference , Chef and new recipe, Chef and Cake, Devu and binary String
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Na2a and lucky stone, Chef and Cube, Bread
August Challenge 2015
Gravity Guy, Cooking Machine
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
September Challenge 2016
Chef and digits of a number
