This package contains the source and data for day 9 of the challenge.
- Status: Complete
- Difficulty Rating: 2.5 / 5
It was nice to have a bit of an easier one after day 8. Unfortunately I didn't read the second part of the question correctly, and was making out the problem to be more difficult than it was.
I ended up using recursion to explore the area around the low points, but any method to locate the cavities within the '9' digits would've done the trick.