December Challenge 2020 Division 2
Positive Prefixes, Hail XOR, Vaccine Distribution, Vaccine Production, Even Pair Sum
February Challenge 2021 Division 3
Frog Sort, Team Name, Chef and Meetings, Prime Game, Maximise Function, Highest Divisor
March Cook-Off 2021 Division 2
Consecutive Deletions, Matrix XOR, Guess the Number
March Challenge 2021 Division 2
Wireless Electricity (Challenge), Space Arrays, Consecutive Adding, Paparazzi Gennady, College Life 4, Interesting XOR!
April Challenge 2021 Division 2
Binary String MEX, Worthy Matrix, Chef and Dice
May Cook-Off 2021 Division 2
The Last Problem, Chef and Subarrays
June Lunchtime 2021 Division 2
False Number, Unpleasant Ones
July Lunchtime 2021 Division 2
Beautiful Pairs, Array Rotation Returns
Starters 103 Division 2 (Rated)
Unique xor, Divisible By 8, Dice Number
