November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes, Chef Hates Palindromes
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
December Cook-Off 2017
Beautiful Array, Football Match
December Lunchtime 2017
Days in Month, Strange Function
January Challenge 2018
String Merging, Partition the numbers, Maximum Score, K-Concatenation, Rectangle
January Cook-Off 2018
Multiple of 3, Survive in ChocoLand
January Lunchtime 2018
Chef and Game with Sequence, Chef and Escaping from the Labyrinth
March Cook-off 2018 Division 1
Chef Goes to the Cinema, Chef Restores a Matrix
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Fake Binary Search, Dibs on Fibs
India