December Challenge 2019 Division 2
That Is My Score!, Plus Multiply
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Equality, Breaking Bricks
February Challenge 2020 Division 2
Long Contest and Cook Off Overlaps, (Challenge) Raisins, Hard Cash, School of Geometry, The Theatre Problem, No Change Required, Chef and Railway Stations
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Leaked Answers (Challenge)
May Challenge 2020 Division 2
Triple Sort, Sorting Vases, Coronavirus Spread, Chef and Bitwise Product, Isolation Centers
January Cook-Off 2020 Division 2
Chef Chick, Exam Cheating
January Lunchtime 2020 Division 2
Bob and His Friends, Chef and Street Food
June Challenge 2020 Division 1
The Tom and Jerry Game!, Operations on a Tuple, Convenient Airports, Covid Sampling (Challenge)
July Challenge 2020 Division 1
Chefina and Swaps, Missing a Point
September Challenge 2020 Division 2
A Problem on Sticks, Ada Matrix, Coronavirus Spread 2
July Cook-Off 2020 Division 1
OR-thodox Distinction, Even-tual Reduction
August Lunchtime 2022 Division 2 (Rated)
Easy Permutation, Array Equality, Sort the Array, Tree Coloring, Subtract 12 Operation
Starters 53 Division 2 (Rated)
Make A and B equal, Queen Blocks
Starters 62 Division 2 (Rated)
Joint XOR, Disjoint XOR, Sorted Substrings, Make Multiple, Final Sum
India