NotAwfulTech

385 readers

3 users here now

a community for posting cool tech news you don’t want to sneer at

non-awfulness of tech is not required or else we wouldn’t have any posts

founded 1 year ago

MODERATORS

[email protected]

Advent of Code 2024 - Historian goes looking for history in all the wrong places (adventofcode.com)

submitted 3 weeks ago by [email protected] to c/[email protected]

54 comments fedilink hide all child comments

copy pasting the rules from last year's thread:

Rules: no spoilers.

The other rules are made up aswe go along.

Share code by link to a forge, home page, pastebin (Eric Wastl has one here) or code section in a comment.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 4 points 2 weeks ago (1 children)

day 8 part 2

Eric added some 0s in the grid which fucked up my existence code, sneaky devil

[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago)

I almost got done in by floating point arithmetic, I think

8-2 commentary

Used the coordinates of every two same type frequences to create the ilnear equation (y = ax + b) and then fed it all the matrix coordinates to see which belonged to the line. To get the correct number of antinodes I had to check for |y - ax - b| < 0.0001, otherwise I got around 20 too few.