February Challenge 2020 Division 2
No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps, Chef and Railway Stations
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Ready Bitwise, Unit GCD
August Challenge 2020 Division 1
Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Find XOR, Ada Matrix, Chefina and Swap, Chef and Trump Cards
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
July Lunchtime 2020 Division 2
Chef and Steps, Maximum Candies
October Challenge 2020 Division 2
Covid Run, Chef and Easy Queries, Positive AND
January Challenge 2021 Division 2
Chef and Ants, Watching CPL, Fair Elections
October Lunchtime 2020 Division 2
AND Plus OR, Chef and Subtree MEXs, Chef Likes Good Sequences, Chef Is Just Throwing Random Words
