September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Weasel does Xor on Tree, Little Chef and Sums, Sereja and Commands
October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
January Challenge 2018
A humongous Query, Partition the numbers, String Merging, Rectangle, Maximum Score, K-Concatenation
February Cook-Off 2018
Chef and Cook-Off, Chef and Tuples, Chef and Line
