January Challenge 2021 Division 2
Guess the Tiling, Expected Number of SCCs, Watching CPL, Fair Elections, Chef and Ants
December Challenge 2020 Division 2
Hail XOR, String Operations, Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution
February Challenge 2021 Division 2
XOR Sums, Maximise Function, Multiple Games, Another Tree with Number Theory, Team Name, Frog Sort, Prime Game
March Challenge 2021 Division 2
Space Arrays, Maximum Topological Sort, Wireless Electricity (Challenge), Paparazzi Gennady, Consecutive Adding, College Life 4, Dense Graph, Interesting XOR!
April Challenge 2021 Division 1
Binary String MEX, Tree Permutations, Worthy Matrix, Destroy the EMP Chip, Chef and Dice, Boolean Game
