February Challenge 2018
Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome, Chef And His Characters
April Challenge 2018 Division 2
Weight of Numbers, Workers
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests, Chef and Happiness
November Challenge 2019 Division 2
Physical Exercise, Hard Sequence, From Zero to Infinity, Weapon Value, Chef and Minimum Colouring
December Challenge 2019 Division 2
That Is My Score!, Plus Multiply, Easy Subsequence Selection
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Equality, Breaking Bricks
February Challenge 2020 Division 2
School of Geometry, Long Contest and Cook Off Overlaps, Hard Cash, The Theatre Problem, No Change Required
May Challenge 2020 Division 2
Triple Sort, Coronavirus Spread, Chef and Bitwise Product, Isolation Centers
January Challenge 2021 Division 2
Watching CPL, Fair Elections
India