December Challenge 2019 Division 2
Binary XOR, Easy Subsequence Selection, That Is My Score!, Addition, Plus Multiply
January Challenge 2020 Division 2
Chef and Dynamo, Breaking Bricks
February Challenge 2020 Division 2
The Theatre Problem, School of Geometry, Hard Cash
April Challenge 2020 Division 2
Sell All the Cars, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Unit GCD, Ready Bitwise, Squared Subsequences, Strange Number
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Operations on a Tuple, Chef and Icecream, Covid Sampling (Challenge), Chef and String, Chef and Price Control
July Lunchtime 2020 Division 2
Chef and Steps, Maximum Candies, Binary Concatenation
United States