December Challenge 2018 Division 2
Chef and Interactive XOR, Chef and Interactive Contests, Chef and An Ideal Problem, Max and Electrical Panel
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests, Chef and Happiness
January Challenge 2019 Division 2
Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Lucky Number Game
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Breaking Bricks
August Challenge 2020 Division 1
Smallest KMP, Chef and Wedding Arrangements
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
July Lunchtime 2020 Division 2
Chef and Steps, Maximum Candies, Binary Concatenation
India