January Challenge 2018
Maximum Score, Rectangle, String Merging, Partition the numbers, K-Concatenation
February Challenge 2018
Broken Clock, Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
March Challenge 2018 DIV 2
A Big Sale, Minion Chef and Bananas, Minions and Voting, Chef and Glove, Mix the Colors, Chef and Easy Problem
May Challenge 2018 Division 2
Minimum Deletions, Dibs on Fibs
August Challenge 2018 Division 2
Modular GCD, Problem Sort, Sheokand and Number, Spell Bob
India