November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle
March Challenge 2018 DIV 2
Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove
September Mega Cook-Off 2018 Division 2
Make a Permutation, ATM Machine
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions
November Challenge 2018 Division 2
Chef and Difficult Contests, Chef and Happiness
June Lunchtime 2018 Division 2
Summary Power, Counting Pretty Numbers
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid, Mix Mix Game
ProCon 2018 (Rated for all)
The Great Run, Kill them with your success
India