December Challenge 2018 Division 2
Chef and Interactive Contests, Max and Electrical Panel, Chef and An Ideal Problem
January Challenge 2019 Division 2
Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
February Challenge 2019 Division 2
Guess It Right, Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars, Manhattan Rectangle
February Cook-Off 2019 Division 2
Buying New Tablet, Chef and Party
February Lunchtime 2019 Division 2
Average Number, The Tricky Deal
March Challenge 2019 Division 2
(Challenge) Interleaving Strings, Chef and a Beautiful Digit, Chef and Number Game, Chef got Recipes, Yet Again a Subarray Problem
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Sum and GCD
July Challenge 2019 Division 1
Guess the Prime!, Circular Merging
August Challenge 2019 Division 1
Football, Zombie and the Caves, Distribute Apples, Maximize an Expression, Dilemma, Encoding, Guddu and his Mother
October Challenge 2019 Division 1
Even Edges, Chef and Maximum Star Value, Array Modification, (Challenge) Maximizing LIS
November Lunchtime 2019 Division 1
Planting Trees, Washing Windows
December Lunchtime 2019 Division 1
The Evil Professor, Check Algorithm, Guess the number
India