From e9b71955f913129124b14e76f42c4d525b9d4237 Mon Sep 17 00:00:00 2001
From: Sijmen <me@sijman.nl>
Date: Fri, 2 Dec 2022 07:22:17 +0100
Subject: [PATCH] day 2

---
 day02.rb | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 day02.rb

diff --git a/day02.rb b/day02.rb
new file mode 100644
index 0000000..1db6e1a
--- /dev/null
+++ b/day02.rb
@@ -0,0 +1,27 @@
+lines = STDIN.read.split("\n")
+
+part1 = 0
+part2 = 0
+
+input = lines.map do |line|
+  theirs = line[0].ord - 'A'.ord
+  ours = line[2].ord - 'X'.ord
+
+  part1 += ours + 1
+
+  if ours == theirs then
+    part1 += 3
+  elsif (theirs + 1) % 3 == ours then
+    part1 += 6
+  end
+
+  if ours == 0 then
+    part2 += (theirs - 1) % 3 + 1
+  elsif ours == 1 then
+    part2 += theirs + 3 + 1
+  else
+    part2 += (theirs + 1) % 3 + 6 + 1
+  end
+end
+
+puts part1, part2