December Challenge 2019 Division 2
Plus Multiply, Binary XOR, Easy Subsequence Selection, Sticky Notes, (Challenge) Cubical Virus, That Is My Score!, Addition, Chefina and Ranges
April Challenge 2020 Division 2
Squared Subsequences, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Sell All the Cars, Unit GCD, Factor Tree, Ready Bitwise, Strange Number
May Challenge 2020 Division 1
Chef and Bitwise Product, Sorting Vases, Triple Sort, Buying a New String, Binary Land
April Lunchtime 2020 Division 1
Xor Jar Muluk Tar, Triangle Query, Positive Mex
June Challenge 2020 Division 1
The Tom and Jerry Game!, Guessing Game
July Challenge 2020 Division 1
Chefina and Swaps, Missing a Point, Doctor Chef
August Challenge 2020 Division 1
Subsequence Frequency Counting, Chef and Wedding Arrangements, Smallest KMP
September Challenge 2020 Division 1
Chefina and Swap, Find XOR, Ada Matrix
June Lunchtime 2020 Division 1
Maximum AND, Gold Mining, Square Submatrices
October Cook-Off 2020 Division 1
Path-etic Sums, Yet Another Crossover Episode
