March Cook-Off 2021 Division 2
Matrix XOR, Guess the Number, Consecutive Deletions
March Challenge 2021 Division 3
Interesting XOR!, Dense Graph, Chef and Groups, College Life 4, Consecutive Adding, Paparazzi Gennady, Space Arrays, Maximum Topological Sort, No Time to Wait
March Lunchtime 2021 Division 2
Dinner by Candlelight, Lunchtime, Uniform, Node Codon, Racing
April Challenge 2021 Division 1
Binary String MEX, Tree Permutations, Worthy Matrix, Chef and Dice, Boolean Game
May Challenge 2021 Division 1 (Unrated)
Valid Paths, Tree House, Xor Equality
Uzbekistan