Codingquest complete

5 files changed, 359 insertions, 0 deletions

diff --git a/codingquest2024/src/day7/solution.gleam b/codingquest2024/src/day7/solution.gleam
new file mode 100644
index 0000000..2ca7cbf
--- /dev/null
+++ b/codingquest2024/src/day7/solution.gleam
@@ -0,0 +1,73 @@
+import gleam/io
+import gleam/string
+import gleam/set.{type Set}
+import gleam/int
+import gleam/regex.{Match}
+import gleam/option.{Some}
+import simplifile
+
+pub opaque type Item {
+  File(name: String, size: Int)
+  Directory(name: String)
+}
+
+pub fn main() {
+  let assert Ok(data) = simplifile.read(from: "./src/day7/data.txt")
+  let lines = string.split(data, "\n")
+
+  mark_for_deletion(lines, 0, "", set.new())
+  |> io.debug()
+}
+
+fn mark_for_deletion(
+  lines: List(String),
+  deleted: Int,
+  current_folder: String,
+  deleted_folders: Set(String),
+) {
+  case lines {
+    [] -> deleted
+    ["Folder: " <> folder, ..rest] ->
+      mark_for_deletion(rest, deleted, folder, deleted_folders)
+    [file, ..rest] -> {
+      case
+        string.contains(file, "temporary")
+        || string.contains(file, "delete")
+        || set.contains(deleted_folders, current_folder)
+      {
+        True ->
+          case string.contains(file, "[FOLDER") {
+            True -> {
+              file
+              |> get_folder_number()
+              |> set.insert(deleted_folders, _)
+              |> mark_for_deletion(rest, deleted, current_folder, _)
+            }
+            False -> {
+              file
+              |> get_file_size()
+              |> int.add(deleted, _)
+              |> mark_for_deletion(rest, _, current_folder, deleted_folders)
+            }
+          }
+        False ->
+          mark_for_deletion(rest, deleted, current_folder, deleted_folders)
+      }
+    }
+  }
+}
+
+fn get_folder_number(file) {
+  let assert Ok(re) = regex.from_string("\\[FOLDER ([0-9]+)\\]")
+
+  let assert [Match(submatches: [Some(n)], ..)] = regex.scan(re, file)
+  n
+}
+
+fn get_file_size(file) {
+  let assert Ok(re) = regex.from_string("- .+ ([0-9]+)$")
+
+  let assert [Match(submatches: [Some(n)], ..)] = regex.scan(re, file)
+  let assert Ok(n) = int.parse(n)
+  n
+}
diff --git a/codingquest2024/src/day8/solution.gleam b/codingquest2024/src/day8/solution.gleam
new file mode 100644
index 0000000..cb4d907
--- /dev/null
+++ b/codingquest2024/src/day8/solution.gleam
@@ -0,0 +1,26 @@
+import gleam/io
+import gleam/int
+import gleam/list
+import utilities/memo
+
+const options = [40, 12, 2, 1]
+
+const distance = 856
+
+pub fn main() {
+  use cache <- memo.create()
+  solve(distance, cache)
+  |> io.debug
+}
+
+fn solve(target, cache) {
+  use <- memo.memoize(cache, target)
+  case target {
+    0 -> 1
+    _ ->
+      options
+      |> list.filter(fn(n) { n <= target })
+      |> list.map(fn(n) { solve(target - n, cache) })
+      |> int.sum
+  }
+}
diff --git a/codingquest2024/src/day9/input.txt b/codingquest2024/src/day9/input.txt
new file mode 100644
index 0000000..1d30914
--- /dev/null
+++ b/codingquest2024/src/day9/input.txt
@@ -0,0 +1,203 @@
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\ No newline at end of file
diff --git a/codingquest2024/src/day9/solution.gleam b/codingquest2024/src/day9/solution.gleam
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/codingquest2024/src/day9/solution.gleam
diff --git a/codingquest2024/src/utilities/memo.gleam b/codingquest2024/src/utilities/memo.gleam
new file mode 100644
index 0000000..b06d8fd
--- /dev/null
+++ b/codingquest2024/src/utilities/memo.gleam
@@ -0,0 +1,57 @@
+import gleam/dict.{type Dict}
+import gleam/otp/actor.{type Next, Continue, Stop}
+import gleam/erlang/process.{type Subject, Normal}
+import gleam/option.{None}
+
+const timeout = 1000
+
+type Message(k, v) {
+  Shutdown
+  Get(key: k, client: Subject(Result(v, Nil)))
+  Set(key: k, value: v)
+}
+
+type Server(k, v) =
+  Subject(Message(k, v))
+
+pub opaque type Cache(k, v) {
+  Cache(server: Server(k, v))
+}
+
+fn handle_message(
+  message: Message(k, v),
+  dict: Dict(k, v),
+) -> Next(Message(k, v), Dict(k, v)) {
+  case message {
+    Shutdown -> Stop(Normal)
+    Get(key, client) -> {
+      process.send(client, dict.get(dict, key))
+      Continue(dict, None)
+    }
+    Set(key, value) -> Continue(dict.insert(dict, key, value), None)
+  }
+}
+
+pub fn create(apply fun: fn(Cache(k, v)) -> t) -> t {
+  let assert Ok(server) = actor.start(dict.new(), handle_message)
+  let result = fun(Cache(server))
+  process.send(server, Shutdown)
+  result
+}
+
+pub fn set(in cache: Cache(k, v), for key: k, insert value: v) -> Nil {
+  process.send(cache.server, Set(key, value))
+}
+
+pub fn get(from cache: Cache(k, v), fetch key: k) -> Result(v, Nil) {
+  process.call(cache.server, fn(c) { Get(key, c) }, timeout)
+}
+
+pub fn memoize(with cache: Cache(k, v), this key: k, apply fun: fn() -> v) -> v {
+  let result = case get(from: cache, fetch: key) {
+    Ok(value) -> value
+    Error(Nil) -> fun()
+  }
+  set(in: cache, for: key, insert: result)
+  result
+}