June Challenge 2016
Chef And Binary Operation, Devu and an Array
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
June Challenge 2017
A Good Set, Xenny and Coin Rankings, Chef and the Feast
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
January Challenge 2018
Partition the numbers, Maximum Score, K-Concatenation, Rectangle
February Challenge 2018
Chef And His Characters, Chef And The Patents
August Challenge 2018 Division 2
Modular GCD, Problem Sort, Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
War of XORs, Chef and Adventures, Magician versus Chef
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
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