October Challenge 2019 Division 2
Operations on a Matrix, Array Modification, Phone Prices
December Challenge 2019 Division 2
Chefina and Ranges, Plus Multiply, Binary XOR, Easy Subsequence Selection, That Is My Score!, Addition
January Challenge 2020 Division 2
Chef and Dynamo, Breaking Bricks
February Challenge 2020 Division 2
Hard Cash, School of Geometry
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue
April Cook-Off 2020 Division 2
Matrix Decomposition, Lift Requests
June Challenge 2020 Division 2
The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control, Even Matrix
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
August Challenge 2020 Division 2
Chef Wars - Return of the Jedi, Chef and Wedding Arrangements, Smallest KMP, Chef and Linear Chess, Another Card Game Problem
September Challenge 2020 Division 2
Chefina and Swap, A Problem on Sticks, Chef and Trump Cards, Find XOR, Ada Matrix, Coronavirus Spread 2
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