March Challenge 2016
maximize the sum, Parity tree, Chef And Special Dishes, Palindromic substrings
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
January Challenge 2021 Division 1
Expected Number of SCCs, Chef and Ants
December Challenge 2020 Division 1
Hail XOR, Square Root of LCA Convolution, Calculus, Linear Combination, Permutations, String Operations, Positive Prefixes, Even Pair Sum
November Lunchtime 2020 Division 1
Gasoline, Rook Path, Fractions
