April Cook-Off 2020 Division 2
Tower Counting, Simple Operations, Lift Requests, Matrix Decomposition
May Cook-Off 2020 Division 1
Chef, Chefina and Their Friendship, Chefina on a Trip, Roads in Chefland
April Lunchtime 2020 Division 2
Another Birthday Present!, Positive Mex, Chef in Fantasy League
May Lunchtime 2020 Division 1
Convert the String, Tree difference
June Challenge 2020 Division 1
The Tom and Jerry Game!, Operations on a Tuple
July Cook-Off 2020 Division 1
Path-etic Products, OR-thodox Distinction, Even-tual Reduction
July Lunchtime 2020 Division 1
Golomb Sequence, Binary Concatenation
August Cook-Off 2020 Division 1
Red-blue Trees, Polygon Relationship
June Lunchtime 2020 Division 1
Maximum AND, Square Submatrices
RECode 12.0 (Rated for all)
Chef and String, Chef and Walk, Chef and Rotation, Chef and Numbers
December Lunchtime 2020 Division 1 (Unrated)
Three Letters, One Zero Swaps
November Cook-Off 2020 Division 1
Flip the String, Chef and IPC Certificates, Hiring Workers
Russia