December Cook-Off 2020 Division 2
Self-Destructing Strings, Sed Passwords, Catch the Thief, Circle of Chaos, Carry All Fruits, Minimum Attendance Requirement, Mysterious Sequence
January Cook-Off 2021 Division 2
Mex Subsequence, Not Too Colourful, Prime Tuples, Maximise Islands, Prefix And, Equal Gifts
December Lunchtime 2020 Division 1 (Unrated)
K-Tuple Tree, One Zero Swaps, Three Letters, Even Sequence
November Lunchtime 2020 Division 2
Gasoline Introduction, Xor Compare, Gasoline, Rook Path, Fractions
February Challenge 2021 Division 1
Team Name, Cell Shell, Bash Matrix, Cut the Cake (Challenge), Dream and the Multiverse, Multiple Games, Prime Game, Another Tree with Number Theory, XOR Sums
February Lunchtime 2021 Division 1
Average Sorting, Sed Max, Chef and Reordering, Independent Set
March Challenge 2021 Division 1
Clique Boolean Expression, Maximum Topological Sort, Random Walk Queries, Locked Safe, Wireless Electricity (Challenge), Space Arrays, Substring Probability, Paparazzi Gennady, Consecutive Adding, Dense Graph
North Korea