[AoC2022] 06 Rust & Elixir

1 files changed, 27 insertions, 0 deletions

diff --git a/AoC2022/06/solver.exs b/AoC2022/06/solver.exs
new file mode 100644
index 0000000..3d47677
--- /dev/null
+++ b/AoC2022/06/solver.exs
@@ -0,0 +1,27 @@
+defmodule Solver.Day6 do
+  def marker([_h | tail] = line, distinct, counter) do
+    line
+    |> Enum.take(distinct)
+    |> MapSet.new()
+    |> MapSet.size()
+    |> Kernel.then(fn amount ->
+      case amount do
+        ^distinct -> counter
+        _ -> marker(tail, distinct, counter + 1)
+      end
+    end)
+  end
+
+  def start(msg, distinct) do
+    String.graphemes(msg) |> marker(distinct, distinct) |> IO.puts()
+  end
+end
+
+case File.read("input") do
+  {:ok, body} ->
+    Solver.Day6.start(body, 4)
+    Solver.Day6.start(body, 14)
+
+  {:error, reason} ->
+    IO.puts(reason)
+end