December Challenge 2018 Division 2
Chef and Interactive XOR, Max and Electrical Panel, 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
Manhattan Rectangle, Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars, Guess It Right
June Challenge 2019 Division 2
Chef and Ingredients, Guddu on a Date, Road Signs, Chef and Proxy
July Challenge 2019 Division 2
Guess the Prime!, Parity Again, Minimum and Maximum, Chef and Mean
October Challenge 2019 Division 2
Array Modification, Phone Prices, Operations on a Matrix, Chef and Maximum Star Value, Bacterial Reproduction, Missing Number, Even Edges
August Challenge 2020 Division 1
Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Chefina and Swap, Chef and Trump Cards, Find XOR, Ada Matrix
India