update demo/README.md

update dev/solution.cs

update dev/solution.py

create dev/solution.py

create dev/solution.cs

create demo/demmm.md

update README.md

create REAdme.md

update spec/README.md

create spec/README.md

spec/README.md

READMEmd

dev/env.example

dev/__init__.py

dev/requirements.txt

dev/solution.py