Yandex Cup 2020 backend section solutions
Problems implemented in Java and Go just for fun and comparison
For qualification round only F problem works. Others unknown
Java solutions
java a.java or java c.java < cinp.txt
with JSON library
java -cp jsom-simple-1.1.1.jar d.java < dinput.txt
Go solutions
go run a.go
Files *.http are for VSCode REST Client plugin. A simple way to test REST API-s