December Challenge 2018 Division 2
Chef and Interactive Contests
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
November Challenge 2019 Division 2
Hard Sequence, Weapon Value
February Challenge 2020 Division 2
School of Geometry, Hard Cash
April Challenge 2020 Division 2
Strange Number, Sell All the Cars, COVID Pandemic and Long Queue
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
January Lunchtime 2020 Division 2
Bob and His Friends, Chef and Street Food
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Missing a Point, Chef and Card Game, Chef and Strings
August Challenge 2020 Division 2
Another Card Game Problem, Chef and Linear Chess, Chef Wars - Return of the Jedi
December Challenge 2020 Division 2
Even Pair Sum, Vaccine Production, Vaccine Distribution
January Challenge 2021 Division 3
Chef and Division 3, Encoded String
March Challenge 2021 Division 3
Interesting XOR!, Chef and Groups, Space Arrays, No Time to Wait
India