December Challenge 2019 Division 2
Easy Subsequence Selection, That Is My Score!, Plus Multiply
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Breaking Bricks
February Challenge 2020 Division 2
No Change Required, The Theatre Problem, School of Geometry, Hard Cash, Long Contest and Cook Off Overlaps
March Challenge 2020 Division 2
XOR Engine, Pintu and Fruits, Ada Bishop 2
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
India