March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Chef and Ballons, Chef And Magical Path, Chef And Coloring
September Challenge 2016
Faded Palindromes, Chef and digits of a number
February Challenge 2017
Chef and His Apartment Dues, Gerrymander
March Challenge 2017
Xenny and Alternating Tasks, Bandwidth of a matrix, Bear and Extra Number
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
July Challenge 2017
Chef and Sign Sequences, Calculator , Whats in the Name
October Challenge 2017
Chef and a great voluntary Program, Max Mex, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Villages and Tribes
India