From 21d032dbff1dea52b8be5651bc52851b21d4dc31 Mon Sep 17 00:00:00 2001
From: Benjamin Wuethrich <benjamin.wuethrich@gmail.com>
Date: Wed, 11 Dec 2024 09:50:02 -0500
Subject: [PATCH] Add 2024, day 11, first part

---
 2024/day11/day11a | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 2024/day11/day11a

diff --git a/2024/day11/day11a b/2024/day11/day11a
new file mode 100755
index 00000000..ac778592
--- /dev/null
+++ b/2024/day11/day11a
@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+
+stones = File.read(ARGV[0]).split
+
+25.times do
+  stones_new = stones.flat_map do |n|
+    if n == "0"
+      "1"
+    elsif n.length.even?
+      [n[...n.length / 2], n[n.length / 2..].to_i.to_s]
+    else
+      (n.to_i * 2024).to_s
+    end
+  end
+
+  stones = stones_new
+end
+
+puts stones.length