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advent-of-code-2025/README.md
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Advent of Code 2025

This repository contains my solutions for the Advent of Code 2025 challenges.

Languages

I am using Go for this year's challenge again.

Structure

Each day's solution is contained in a separate package.

Prerequisite

Running the Solutions

To run a specific day's solution you can run the packages tests:

go test ./cmd/01

Challenges

Day Problem Solution Notes
01 Problem Solution Part 1 seemed straight forward enough. Part 2 completely stumped me. The trickiest part was not counting zero's twice when you ended and then started from there.
02 Problem Solution Part 1 should have been super straight-forward, but some whitespace screwed up my parsing of the final range. I some how was able to stumble over a solution to part 2 rather blindly.
03 Problem Solution Part 1 intuitively makes you think you only care about highest nums, but then you need to consider placement. I once again tripped over the solution using a stack. However chat morally supported me the whole time.
04 Problem Solution Part 1 was by far the most straight-forward challenge so far. This was easiest day of AoC this year by far.
05 Problem Solution Part 1 was fairly straight forward. Merging ranges was trickiest bit. I feel like I'm being led into a trap with how straight forward today was.
06 Problem Solution Part 1 I don't think it is the best solution, but it does solve it. I kicked ass on part 2. 🥳
07 Problem Solution FIFO for life. 🤣. Fuck me...part 2 I found really difficult and the use of DFS was obvious, but doing the memoizing was not.
08 Problem Solution Part 1 had me down bad. I was on the right track with my original solution, but ended up doing it in a brute force way then figuring out my mistake with the original. Fuck this guy. Part 2 was so much easier once part 1 was sorted out.
09 Problem Solution Part 1 was such a nice break from the madness of day 8. Basically I need to go build some video games.
10 Problem Solution Part 1 took me way to look cause I couldn't figure out how to generate all button press combinations.
11 Problem Solution DFS to the rescue again.
12 Problem Solution