December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
November Challenge 2018 Division 2
Chef and Difficult Contests, Chef and Happiness, Chef and Ridges
January Challenge 2019 Division 2
Lucky Number Game, Fancy Quotes
February Challenge 2019 Division 2
Chef and Secret Ingredients, Appy and Contest, Deputy Chef
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Guddu on a Date, Chef and Ingredients, Sum and GCD
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
October Challenge 2019 Division 2
Phone Prices, Operations on a Matrix, Array Modification, Missing Number, Even Edges, Chef and Maximum Star Value
February Challenge 2020 Division 1
Chef and Railway Stations, No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Ready Bitwise, Leaked Answers (Challenge)
June Challenge 2020 Division 1
The Tom and Jerry Game!, Covid Sampling (Challenge), Operations on a Tuple
July Challenge 2020 Division 1
Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef
May Challenge 2021 Division 1 (Unrated)
Xor Equality, Tic Tac Toe, Modular Equation
June Challenge 2021 Division 1 (Unrated)
Shortest Route, Bitwise Tuples, Bella ciao, Summer Heat
India