October Challenge 2019 Division 2
Even Edges, Missing Number, Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
December Challenge 2019 Division 2
That Is My Score!, Addition, (Challenge) Cubical Virus, Sticky Notes, Easy Subsequence Selection, Binary XOR, Plus Multiply, Chefina and Ranges
March Challenge 2020 Division 1
Chef and DAG, Lasers Everywhere
August Challenge 2020 Division 1
Insanely Hard School Exams, Subsequence Frequency Counting, Chefina and Strange Tree, Smallest KMP, Chef and Wedding Arrangements
April Challenge 2021 Division 1
Binary String MEX, Tree Permutations, Worthy Matrix, Chef and Dice
Peru