May Cook-Off 2019 Division 2
Chain Reaction, Misha and Nice Sets, Expected Xor, Recover the Sequence, Searching for a Biclique
August Challenge 2020 Division 2
Subsequence Frequency Counting, Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP, Chef and Wedding Arrangements
January Cook-Off 2021 Division 2
Mex Subsequence, Prime Tuples, Maximise Islands
Cuba