October Challenge 2016
Chef and Three Dogs, Chef and Keyboard
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues
February Challenge 2019 Division 2
Art of Balance, Deputy Chef, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars, Manhattan Rectangle
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit
March Cook-Off 2019 Division 2
XOR N-bonacci Sequence, UEFA Champions League
April Challenge 2019 Division 2
Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing
India