February Challenge 2019 Division 2
Chef and Secret Ingredients, Appy and Contest, Deputy Chef, Chef and Magical Jars
July Challenge 2019 Division 2
Guess the Prime!, Parity Again, Minimum and Maximum, Chef and Mean
September Challenge 2019 Division 2
Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
September Lunchtime 2019 Division 2
Chef Feeds Cats, Chef and Football Match
October Challenge 2019 Division 2
Chef and Maximum Star Value, Phone Prices, Operations on a Matrix, Array Modification, Missing Number, Even Edges
December Lunchtime 2019 Division 2
Stupid Machine, Check Algorithm, Guess the number
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums
February Challenge 2020 Division 1
Chef and Railway Stations, Long Contest and Cook Off Overlaps, (Challenge) Raisins, Hard Cash, The Theatre Problem, No Change Required, School of Geometry
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Ready Bitwise, Leaked Answers (Challenge)
UWCOI 2020 (Rated for all)
Button Pairs, Base Plans, Find maximum in an Array
June Challenge 2020 Division 1
The Tom and Jerry Game!, Operations on a Tuple
July Challenge 2020 Division 1
Chefina and Swaps, Doctor Chef, Missing a Point, Chef and Dragon Dens
SnackDown 2021 - Online Qualifiers
Lucky Number, Maximum Number Of Distinct Elements, Minimise Difference
SnackDown 2021 - Online Round 1A
Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Equal Beauty, Min Max LCM
India