The "Sonar Sweep" problem is about finding increments in a list of numbers.

I wanted to implement a solution that reads the puzzle input from a file. Since Haskell is a functional language, the usual pure functions do not allow accessing files and similar resources functions. The following guide helped me to understand IO Monads, a concept that allows accessing external resources through "IO actions":

• Learn you a Haskell for Great Good: Input and Output (at the time of writing this, the website is unavailable but can still be accessed through the Wayback Machine)

• ./day01.hs: My solution for part one of this puzzle
• ./input.txt: My personal puzzle input for this challenge
• ./README.md: documentation for this solution :)