Day 10: Pipe Maze

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)

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  • cacheson
    2•11 months ago

    Nim

    I got a late start on part 1, and then had to sleep on part 2. Just finished everything up with a little time to spare before day 11.

    Part 2 probably would have been easier if I knew more about image processing, but I managed:

    • Made a copy of the grid and filled it with . tiles
    • Copied all of the path tiles that I had calculated in part 1
    • Flood-filled all the . tiles that are connected to the outside edges of the grid with O tiles
    • Walked along the path, looking for an adjacent O tile at each step. Stopped when one was found, and recorded whether it was to the left or right of the path.
    • Walked the path again, flood-filling any adjacent inside . tiles with I, and counted them

    Code:

    • AtegonOPM
      2•11 months ago

      btw if you put the url to nim as /c/nim@programming.dev I dont think the url bot will trigger since it does the same thing the ! format does

      [Nim](/c/nim@programming.dev)

      Nim

      Edit: yeah looks like it didnt reply to me so this format works

      • cacheson
        2•11 months ago

        Unfortunately then it’ll be broken for kbin users. I can do it anyway though if the bot is too annoying, just lmk.

    • CommunityLinkFixerBotBEnglish
      1•11 months ago

      Hi there! Looks like you linked to a Lemmy community using a URL instead of its name, which doesn’t work well for people on different instances. Try fixing it like this: !nim@programming.dev