commit 46604370031e68e65f8b57bb7d4bf9cf3a465c89 · aylac.top/advent_of_code

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2025/4/gleam/gleam.toml

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       name = "main"

     

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       version = "1.0.0"

     

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       # Fill out these fields if you intend to generate HTML documentation or publish

     

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       # your project to the Hex package manager.

     

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       #

     

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       # description = ""

     

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       # licences = ["Apache-2.0"]

     

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       # repository = { type = "github", user = "", repo = "" }

     

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       # links = [{ title = "Website", href = "" }]

     

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       #

     

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       # For a full reference of all the available options, you can have a look at

     

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       # https://gleam.run/writing-gleam/gleam-toml/.

     

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       [dependencies]

     

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       gleam_stdlib = ">= 0.44.0 and < 2.0.0"

     

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       simplifile = ">= 2.3.0 and < 3.0.0"

     

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       [dev-dependencies]

     

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       gleeunit = ">= 1.0.0 and < 2.0.0"

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2025/4/gleam/manifest.toml

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       # This file was generated by Gleam

     

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       # You typically do not need to edit this file

     

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       packages = [

     

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         { name = "filepath", version = "1.1.2", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "filepath", source = "hex", outer_checksum = "B06A9AF0BF10E51401D64B98E4B627F1D2E48C154967DA7AF4D0914780A6D40A" },

     

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         { name = "gleam_stdlib", version = "0.65.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "7C69C71D8C493AE11A5184828A77110EB05A7786EBF8B25B36A72F879C3EE107" },

     

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         { name = "gleeunit", version = "1.7.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "CD701726CBCE5588B375D157B4391CFD0F2F134CD12D9B6998A395484DE05C58" },

     

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         { name = "simplifile", version = "2.3.0", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "0A868DAC6063D9E983477981839810DC2E553285AB4588B87E3E9C96A7FB4CB4" },

     

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       ]

     

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       [requirements]

     

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       gleam_stdlib = { version = ">= 0.44.0 and < 2.0.0" }

     

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       gleeunit = { version = ">= 1.0.0 and < 2.0.0" }

     

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       simplifile = { version = ">= 2.3.0 and < 3.0.0" }

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2025/4/gleam/src/main.gleam

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       import gleam/bit_array

     

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       import gleam/int

     

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       import gleam/io

     

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       import gleam/list

     

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       import gleam/result

     

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       import gleam/string

     

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       import simplifile as file

     

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       fn solve(input, size) {

     

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         let get_place = fn(x, y) {

     

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           case

     

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             case x, y {

     

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               _, -1 | -1, _ -> <<>>

     

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               s, _ | _, s if s == size -> <<>>

     

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               _, _ -> bit_array.slice(input, y * size + x, 1) |> result.unwrap(<<>>)

     

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             }

     

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           {

     

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             <<"@">> -> 1

     

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             _ -> 0

     

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           }

     

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         }

     

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         list.range(0, bit_array.byte_size(input) - 1)

     

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         |> list.fold(0, fn(acc, pos) {

     

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           let x = pos % size

     

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           let y = pos / size

     

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           let roll = get_place(x, y)

     

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           let neighbours =

     

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             get_place(x - 1, y - 1)

     

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             + get_place(x, y - 1)

     

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             + get_place(x + 1, y - 1)

     

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             + get_place(x - 1, y)

     

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             + get_place(x + 1, y)

     

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             + get_place(x - 1, y + 1)

     

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             + get_place(x, y + 1)

     

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             + get_place(x + 1, y + 1)

     

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           case roll, neighbours < 4 {

     

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             1, True -> acc + 1

     

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             _, _ -> acc

     

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           }

     

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         })

     

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       }

     

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       pub fn main() {

     

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         let assert Ok(input) = file.read(from: "../input.txt")

     

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           as "Input file not found"

     

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         let input =

     

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           input |> string.trim |> string.split("\n") |> list.map(fn(v) { <<v:utf8>> })

     

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         let size = list.length(input)

     

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         let input = input |> list.fold(<<>>, fn(acc, l) { bit_array.append(acc, l) })

     

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         // @ and .

     

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         solve(input, size)

     

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         |> int.to_string

     

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         |> io.println

     

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       }