October Challenge 2017
Chef and a great voluntary Program, Chef and Cycled Cycles, 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
Penalty Shoot-out, Chef and Hamming Distance of arrays, Chef And his Cake, Total Diamonds, Chef and Universe
April Challenge 2018 Division 2
Weight of Numbers, Count Good Prefixes, Average of Pairs, Workers
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests
October Challenge 2018 Division 2
Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard, Chef and Serves, Byte to Bit
United States