Day 1: Historian Hysteria

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://blocks.programming.dev/ if you prefer sending it through a URL

FAQ

  • janAkali@lemmy.one
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    15 days ago

    Nim

    I’ve got my first sub-1000 rank today (998 for part 2). Yay!
    Simple and straightforward challenge, very fitting for 1st day. Gonna enjoy it while it lasts.

    proc solve(input: string): AOCSolution[int, int] =
      var l1,l2: seq[int]
      for line in input.splitLines():
        let pair = line.splitWhitespace()
        l1.add parseInt(pair[0])
        l2.add parseInt(pair[1])
      l1.sort()
      l2.sort()
    
      block p1:
        for i in 0..l1.high:
          result.part1 += abs(l1[i] - l2[i])
    
      block p2:
        for n in l1:
          result.part2 += n * l2.count(n)
    

    Codeberg repo