January Challenge 2020 Division 2
Breaking Bricks, Chef and Dynamo
April Challenge 2020 Division 2
Strange Number, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue
May Challenge 2020 Division 2
Triple Sort, Coronavirus Spread, Chef and Bitwise Product, Isolation Centers
April Cook-Off 2020 Division 2
Lift Requests, Simple Operations
April Lunchtime 2020 Division 2
Another Birthday Present!, Chef in Fantasy League
June Challenge 2020 Division 2
Chef and Price Control, Chef and String, Operations on a Tuple, Chef and Icecream, The Tom and Jerry Game!, Even Matrix
July Challenge 2020 Division 1
Chefina and Swaps, Missing a Point, Doctor Chef
August Challenge 2020 Division 1
Insanely Hard School Exams, Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
July Lunchtime 2020 Division 2
Chef and Steps, Maximum Candies, Binary Concatenation
India