I've just finished making a tool to help pick problems for training mashups, and thought it might be helpful so here it is.
- Add users' handles to exclude all their attempted problems.
- Specify how many problems you want per rating.
- Saves the handles to be used later.
- No need to fetch the attempted problems list every time.
Click this link to the Github Repo and read the README file there to get started.
Please feel free to share any suggestions or report any bugs you may have encountered.
I hope you find it useful. Thank you!