October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Chef and Hamming Distance of arrays, Red and blue points, Penalty Shoot-out, Chef And his Cake, Total Diamonds, Chef and Universe, Chef And Easy Xor Queries
August Cook-Off 2017
Real obtuse, From heaven to earth
November Cook-Off 2017
Skiing, Online Chess, Random Pair
December Lunchtime 2017
Days in Month, Strange Function
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
Bangladesh