Day 4: Ceres Search

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

  • mykl@lemmy.world
    0·
    3 months ago

    Uiua

    Just part1 for now as I need to walk the dog :-)

    Data   ← $ MMMSXXMASM
         $ MSAMXMSMSA
         $ AMXSXMAAMM
         $ MSAMASMSMX
         $ XMASAMXAMM
         $ XXAMMXXAMA
         $ SMSMSASXSS
         $ SAXAMASAAA
         $ MAMMMXMMMM
         $ MXMXAXMASX
Parse  ← ⊜∘⊸≠@\n
Grid   ← Parse Data
Points ← [1_0 ¯1_0 0_1 0_¯1 1_1 1_¯1 ¯1_1 ¯1_¯1]
≡⍉⍉×⇡4¤Points             # Use Points to build sets of 4-offsets.
↯∞_2⇡△ Grid               # Get all starting points in grid.
/+♭⊞(≍"XMAS"⬚@.⊡:Grid≡+¤) # Join the two into table, use to pick 4-elements, check, count
      • mykl@lemmy.world
        0·
        3 months ago

        The operators have all got ascii names you can type, and the formatter converts them to the symbols. It’s a bit odd but really worthwhile, as you get access to the powerful array handling functionality that made solving today’s challenges so much more straightforward than in other languages.