April Challenge 2020 Division 2
Squared Subsequences, Ready Bitwise, Factor Tree, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue, Strange Number
April Cook-Off 2020 Division 2
Lift Requests, Simple Operations, Matrix Decomposition, Tower Counting
May Cook-Off 2020 Division 2
Chef and Recipe, Impressing Chefina, Chef, Chefina and Their Friendship, Chefland Squads and the Army Chief, Roads in Chefland
December Lunchtime 2020 Division 1 (Unrated)
Even Sequence, Three Letters, One Zero Swaps
Cuba