Work on the exercises.

[s-matyukevich]

You can submit a PR as soon as an exercise is ready. Other people then will be able to use your code for reference.

[evopen]

If every one submit their exercises to the repo, this repo might get bloated. After all most of the code are pretty similar.

[s-matyukevich]

I don't think this is a problem right now. For now the main goal is to get at least one reference implementation for all exercises. Later, however, I may stop receiving PRs for the exercises that got too many PRs already, unless a PR is indeed a unique one.