May Cook-Off 2019 Division 2
Misha and Nice Sets, Expected Xor, Recover the Sequence, Searching for a Biclique, Chain Reaction
August Cook-Off 2019 Division 2
Rich Substrings, Chef and Pepperoni Pizza, Chef Drinks Coke
March Challenge 2020 Division 1
Lasers Everywhere, Lasers Everywhere Alternative, Winning Ways 2, Break, Chef and DAG
March Cook-Off 2020 Division 1
Mysterious Sequence, Maximize Letter Beauty
March Lunchtime 2020 Division 1 (Unrated)
Maximize LCM, Strip in a Tree!
RECode 12.0 (Rated for all)
Chef and String, Chef and Walk, Chef and Rotation, Chef and Numbers
India