December Challenge 2017
Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
April Challenge 2018 Division 2
Chef and Array (Challenge), Workers, Average of Pairs, Count Good Prefixes, Highway Crossing, Weight of Numbers, Cutting Plants
October Challenge 2019 Division 1
Even Edges, Chef and Maximum Star Value, Array Modification
Turkey