this post was submitted on 06 Dec 2023
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Advent Of Code

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An unofficial home for the advent of code community on programming.dev!

Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.

AoC 2024

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submitted 1 year ago* (last edited 1 year ago) by Ategon to c/advent_of_code
 

Day 6: Wait for It


Megathread guidelines

  • Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
  • Code block support is not fully rolled out yet but likely will be in the middle of the event. Try to share solutions as both code blocks and using something such as https://topaz.github.io/paste/ , pastebin, or github (code blocks to future proof it for when 0.19 comes out and since code blocks currently function in some apps and some instances as well if they are running a 0.19 beta)

FAQ

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[โ€“] [email protected] 8 points 1 year ago (2 children)

Rust

I went with solving the quadratic equation, so part 2 was just a trivial change in parsing. It was a bit janky to find the integer that is strictly larger than a floating point number, but it all worked out.

[โ€“] [email protected] 3 points 1 year ago (2 children)

(number+1).floor() does the trick

[โ€“] [email protected] 2 points 1 year ago

Oh yeah, that's clever. I'll remember that when it comes up again.

[โ€“] [email protected] 1 points 1 year ago* (last edited 1 year ago)

In Python when using numpy to find the roots, sometimes you get a numeric artifact like 30.99999999999, which breaks this. Make sure to limit the significant digits to a sane amount like 5 with rounding to prevent that.

[โ€“] [email protected] 2 points 1 year ago

I wanted to try the easy approach first and see how slow it was. Didn't even take a second for part 2. So I just skipped the mathematical solution entirely.