December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Difficult Contests
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
February Challenge 2019 Division 2
Appy and Contest, Deputy Chef, Chef and Secret Ingredients, Chef and Magical Jars
February Cook-Off 2019 Division 2
Buying New Tablet, Chef and Party
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining
August Challenge 2019 Division 2
Dilemma, Zombie and the Caves, Distribute Apples, Football
December Challenge 2019 Division 2
Plus Multiply, Easy Subsequence Selection, That Is My Score!
January Challenge 2021 Division 2
Guess the Tiling, Expected Number of SCCs, Watching CPL, Fair Elections
December Challenge 2020 Division 2
Hail XOR, Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution
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