December Challenge 2018 Division 2
Chef and Interactive Contests
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests
January Challenge 2019 Division 2
Lucky Number Game, Fancy Quotes
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
August Challenge 2019 Division 2
Dilemma, Distribute Apples, Football
October Challenge 2019 Division 2
Operations on a Matrix, Phone Prices
November Challenge 2019 Division 2
Hard Sequence, Weapon Value
June Challenge 2020 Division 2
The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
February Challenge 2021 Division 3
Frog Sort, Team Name, Chef and Meetings, Prime Game, Maximise Function, Highest Divisor
June Challenge 2021 Division 3 (Rated)
Bella ciao, Summer Heat, Bitwise Tuples
August Long 2022 Division 3 (Rated)
Sale Season, Hello Equation, Two Trains, Maximum Submissions, Make A and B equal
September Long 2022 Division 3 (Rated)
Speed Limit Test, Bob at the Bank, Distinct Numbers, Pokemon Battles, Interesting Subarray, Good Pairs
India