HackerRank problems in PDF by categories.
Since HackerRank is nice enough to provide all problem statements in PDF, this script only downloads all the PDFs and merges them into a single bundle.
Files can be downloaded from the releases page.
The script is written in a very Unix-y way - it only does the minimal task of listing PDF URLs of a category.
Downloading of the PDFs is left to wget, while their merging (into a single file) is done by pdf-merge
As an example:
python3 hacker-rank-pdf.py dynamic-programming
cd "Dynamic Programming"
bash *.sh
sed 's/.*"\(.*\)".*/\1/' *.sh | pdf-merge -o "Dynamic Programming.pdf" -C "|" -f -