December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
January Challenge 2019 Division 2
Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef and a Beautiful Digit, Chef and Number Game
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
April Cook-Off 2019 Division 2
Making a Meal, Chef Learning Hungarian Algorithm
April Lunchtime 2019 Division 2
Attendance, Fast Food, Minimum Sum
May Challenge 2019 Division 2
Matches, Reduce to One, Where to Build the Roads
May Cook-Off 2019 Division 2
Recover the Sequence, Misha and Nice Sets, Chain Reaction
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Sum and GCD
June Cook-Off 2019 Division 1
Ants and Anteaters, Drink Slush
August Challenge 2019 Division 1
Guddu and his Mother, Dilemma, Maximize an Expression
September Challenge 2019 Division 1
Easy Fibonacci, Chef and Interesting Subsequences
December Challenge 2019 Division 2
Binary XOR, Addition, That Is My Score!, (Challenge) Cubical Virus, Sticky Notes, Easy Subsequence Selection, Plus Multiply, Chefina and Ranges
September Challenge 2020 Division 2
A Problem on Sticks, Ada Matrix, Coronavirus Spread 2
September Cook-Off 2020 Division 2
Bulbs and Wires, Bowling Strategy
September Lunchtime 2020 Division 2
GCD operations, Root the Tree, Watermelon
India