Запрос на слияние 'student' (#1) из student в master

upload files

create demo/net

create README.md

update dev/solution.cs

upload files

create demo/net

create README.md

update dev/solution.cs

create dev/solution.cs

update spec/codex.md

create spec/codex.md

update assignment.py

update assignment.py

update assignment.py

update assignment.py