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Haskell solutions to Advent of Code 2025

I decided to learn Haskell using AoC 2025. This endeavour can be found in this directory.

Setup

For this project to find the puzzle inputs, they need to follow a certain format. Actual inputs for the day need to be in ../inputs/dayXX.txt, where XX denotes the (zero-padded) day. Example inputs live in ../examples/dayXX_YY.txt, where XX denotes the day as before and YY indicates the number of the example (also zero-padded).

Invocation

This project uses cabal as a build tool. To build it, run

cabal build

To run it, use

cabal run . -- DAY TASK [-e EXAMPLE]

where DAY and TASK specify the respective day and task. If -e is omitted, the solution is applied to the input file. Otherwise, the solution is applied to the respective example. You can also get a help text via

cabal run . -- --help