December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
April Lunchtime 2019 Division 2
Attendance, Fast Food, Minimum Sum
July Challenge 2019 Division 2
Chef and Mean , Minimum and Maximum, Parity Again
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples
October Challenge 2019 Division 2
Even Edges, Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
October Lunchtime 2019 Division 2
Khaled in HIT, Box Game, Counting Inversions Revisited
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon
India