December Challenge 2018 Division 2
Chef and Interactive XOR, Chef and Interactive Contests, Chef and An Ideal Problem, Max and Electrical Panel
April Challenge 2019 Division 2
Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing
August Challenge 2019 Division 2
Guddu and his Mother, Dilemma, Football, Distribute Apples, Zombie and the Caves
September Challenge 2019 Division 2
Chef and Good Subsequences, Chef Designed a Network
October Challenge 2019 Division 2
Even Edges, Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
May Challenge 2020 Division 2
Triple Sort, Coronavirus Spread, Chef and Bitwise Product, Isolation Centers
April Lunchtime 2020 Division 2
Another Birthday Present!, Chef in Fantasy League
Bangladesh