February Challenge 2019 Division 2
Appy and Contest, Chef and Secret Ingredients, Deputy Chef
February Challenge 2020 Division 2
School of Geometry, Hard Cash
March Challenge 2020 Division 2
XOR Engine, Ada Bishop 2, Pintu and Fruits
April Challenge 2020 Division 2
Unit GCD, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Sell All the Cars, Squared Subsequences, Strange Number
April Cook-Off 2020 Division 2
Matrix Decomposition, Lift Requests
June Challenge 2020 Division 2
Chef and Price Control, Chef and String, Chef and Icecream, The Tom and Jerry Game!, Even Matrix, Covid Sampling (Challenge)
July Challenge 2020 Division 2
Ada King, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
December Challenge 2020 Division 2
Hail XOR, Vaccine Distribution, Vaccine Production, Even Pair Sum, Positive Prefixes
July Challenge 2021 Division 3 (Rated)
XxOoRr, Maximum Production, Relativity
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