March Challenge 2020 Division 2
Chef and DAG, XOR Engine, Ada Bishop 2, Lasers Everywhere, Lasers Everywhere Alternative, Pintu and Fruits
January Cook-Off 2020 Division 2
Chef Chick, Exam Cheating, Profitable Paths, Range AND, Chefina and Sums
March Cook-Off 2020 Division 1
Escape the Tree , Maximize Letter Beauty, Mysterious Sequence
January Lunchtime 2020 Division 2
Construct Array, Bob and His Friends, Chef and Street Food, Under the Tunnels, Folding Paper
April Lunchtime 2020 Division 1
Triangle Query, Positive Mex
RECode 12.0 (Rated for all)
Chef and String, Chef and Walk, Chef and Rotation, Chef and Numbers
Russia