November Cook-Off 2018 Division 2
Beautiful Garland, Truth and Dare
December Challenge 2018 Division 2
(Challenge) Delete DAG, Max and Electrical Panel, Chef and Interactive XOR, Chef and Meatballs, Chef and Interactive Contests, Chef and An Ideal Problem
December Lunchtime 2018 Division 1
Age Calculator, Choosing from Buckets
March Challenge 2019 Division 1
Chef and Soccer, Yet Again a Subarray Problem
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal
September Lunchtime 2019 Division 1
All Substrings, Find the Sum
Russia