September Challenge 2016
Chef and digits of a number, Chef and calculation, Faded Palindromes
October Challenge 2016
Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs
November Challenge 2016
Count Permutations, Friends Meeting, Gift and Chef, Chef and squares, Task for Alexey
December Challenge 2016
Kirito in labyrinth, Our Base is Under Attack, Kth Max Subarray, Train Partner
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior, Tourists in Mancunia
February Challenge 2017
Gerrymander, Most Frequent Element, Chef and his Best Friend, Chef and Triangles, Chef and His Apartment Dues
April Challenge 2017
Chef and Divisor Tree, Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
May Challenge 2017
Blocked websites, Chef and Subsequences, Median of adjacent maximum numbers, Courses in an university, Chef and his daily routine, Chef and Sub Array
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
India