December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
November Challenge 2018 Division 2
Chef and Difficult Contests
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Fuzzy Linear Combinations, Chef Designed a Network, Chef and Interesting Subsequences
October Challenge 2019 Division 2
Chef and Maximum Star Value
December Challenge 2019 Division 2
Plus Multiply, Easy Subsequence Selection, That Is My Score!, Addition
December Lunchtime 2019 Division 2
Guess the number, Check Algorithm, Stupid Machine
February Challenge 2020 Division 2
The Theatre Problem, School of Geometry, Hard Cash
May Challenge 2020 Division 2
Triple Sort, Coronavirus Spread, Chef and Bitwise Product, Isolation Centers
June Challenge 2020 Division 2
The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Chef and Card Game, Chef and Strings
Bangladesh