From 5bbeb5d969b1229d53798a1caad52a566634b6ff Mon Sep 17 00:00:00 2001
From: Alpha Chen <alpha@kejadlen.dev>
Date: Thu, 14 Dec 2023 21:04:31 -0800
Subject: [PATCH] [2023][ruby][15.1]

---
 2023/ruby/day_15.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 2023/ruby/day_15.rb

diff --git a/2023/ruby/day_15.rb b/2023/ruby/day_15.rb
new file mode 100644
index 0000000..24bc487
--- /dev/null
+++ b/2023/ruby/day_15.rb
@@ -0,0 +1,12 @@
+input = ARGF.read.strip.split(?,).map(&:chars)
+
+# part one
+p input.sum {|str|
+  current = 0
+  str.each do |c|
+    current += c.ord
+    current *= 17
+    current %= 256
+  end
+  current
+}