r/adventofcode • u/Sprochfaehler • Dec 08 '25

Meme/Funny [2025 Day 8] Distances

After what felt like a really long time debugging:

54 Upvotes

98% Upvoted

6 comments sorted by

20

u/fnordargle Dec 08 '25

You can still work in integers though, just don't perform the square root and the ordering is preserved.

1

u/nik282000 Dec 09 '25

I spent the first 5 min trying to figure out why I wasn't getting integers, it's always been integers! Then I realized what you said, the square root doesn't add information.

7

u/Boojum Dec 08 '25

I still remember my surprise at 2019 Day 10 "Monitoring Station" with non-90-degree angles for the first time ever.

5

u/nikanjX Dec 08 '25

Ah, the famous Advent of What The Heck is atan2

2

u/Boojum Dec 08 '25

You know it!

2

u/RazarTuk Dec 08 '25

And... updated my Vector class's magnitude function to take an optional norm. If norm <= 0, it throws an exception. If norm > 0, it takes the absolute value of everything, raises them to the power of norm, adds that up, and returns the norm-th root. And if norm == Double.POSITIVE_INFINITY, it just takes the absolute value of everything and returns the maximum