Day 7: Laboratories

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)
  • You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ if you prefer sending it through a URL

FAQ

  • Quant@programming.dev
    1·
    41 minutes ago

    Uiua

    Part 1 was fun, though I had quite some frustration with getting the loop work the way I wanted it to.
    For part 2 I didn’t actually need to modify that much, just pass another function to deal with the list of tachyons: part 1, remove duplicates, part 2, don’t remove and count at the end. Easy. Or so I thought.
    I realized something was wrong when it just wouldn’t stop running and the fan got louder.

    Today I started over from scratch and decided to solve both parts at once since I basically got the counts for each row anyways, so I just had to change the way the splitting was handled.
    There was one occasion where I got an error that the resulting array would be too big (~4GB) but at least I got a warning instead of seeing RAM usage spike suddenly :P

    Run with example input

    Code 
    $ .......S.......
$ ...............
$ .......^.......
$ ...............
$ ......^.^......
$ ...............
$ .....^.^.^.....
$ ...............
$ ....^.^...^....
$ ...............
$ ...^.^...^.^...
$ ...............
$ ..^...^.....^..
$ ...............
$ .^.^.^.^.^...^.
$ ...............
# &fras "input-7.txt" ◌
⊜∘⊸≠@\n
⊃(=@S⊡₀)(⊏⊚>0⊸≡/+=@^↘₂)
ShootSplit ← (
  ⤚(=2+>0)
  ⧻⊸⊚
  ⊙(⟜₂(
      ⟜⊏⊚⊙⟜[⧻]
      ⍚(⊂⊃-₁+₁)
      /+≡⌟(⬚0˜↯×◇°⊚)
    )
    +⍜⊏(˜↯0⧻)⊚
  )
)

Solve ← (
  0
  ⍥(⊙(+|ShootSplit|⊃⊡₀↘₁))◡⋅⋅⧻
  ⊟⊙⊙◌⊙/+
)

Solve
≡(&p $"Part _: _") 1_2

    And for completeness sake:

    Previous attempt

    Edit: Tried to scrape the old code together but seems like it doesn’t actually work like this. Probably just some small thing I missed but I don’t have the mental energy to take a look at this mess again :P

    Prep ← ⊃(⊚=@S)⊜∘⊸≠@\n

Splits! ← (
  ˙⍤>0◡⋅⧻
  ⤚(=⧻⤙˜⨂)
  ∩⌟▽⊸¬
  ⊸⧻
  ⊙(♭≡[⊃-₁+₁]
    ^⊂)
)

Shoot! ← (
  0
  ⍢(⊙(+
    | ⍣Splits!^⊸⋅0
    | ⊚=@^°⊂
    )
  | >0⋅⋅⧻)
)

PartOne ← (
  &fras "input-7.txt"
  Prep
  ⊙⋅◌Shoot!◴
)

PartTwo ← (
  &fras "input-7.txt"
  Prep
  ⧻⋅⊙◌Shoot!∘
)