August Challenge 2015
Cooking Machine, Gravity Guy
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Bear and Row 01, Similar Dishes, Dish Of Life
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates
October Challenge 2017
Max Mex, A Balanced Contest
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples, Guddu and his Mother
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
October Challenge 2019 Division 2
Array Modification, Phone Prices, Operations on a Matrix, Chef and Maximum Star Value
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Equality, Breaking Bricks
April Challenge 2020 Division 2
Sell All the Cars, COVID Pandemic and Long Queue
India