December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
July Challenge 2019 Division 2
Parity Again, Minimum and Maximum, Chef and Mean
October Challenge 2019 Division 2
Operations on a Matrix, Phone Prices
November Challenge 2019 Division 2
Physical Exercise, Hard Sequence, From Zero to Infinity, Weapon Value, Chef and Minimum Colouring
December Challenge 2019 Division 2
Plus Multiply, Binary XOR, Easy Subsequence Selection, Sticky Notes, That Is My Score!, Addition
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