Don't do all the problems - only do 3 or 4 (Pick the ones you find interesting - it tells me something about you)
The "recap" package contains a summary of the coding techniques that you might find useful
Fork the repo and send a pull request when you are done (see https://jarv.is/notes/how-to-pull-request-fork-github/), or else download the repo as a zip file (see under code menu) and email the source files of the problems you have solved.