From 2e15fbd3a5baaefbd325453f965eb58c7b56be76 Mon Sep 17 00:00:00 2001
From: Nat Lasseter <Nat Lasseter nathan@bytemark.co.uk>
Date: Fri, 1 Dec 2017 11:57:19 +0000
Subject: Initial commit, day01

---
 day01/part2 | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100755 day01/part2

(limited to 'day01/part2')

diff --git a/day01/part2 b/day01/part2
new file mode 100755
index 0000000..c8356df
--- /dev/null
+++ b/day01/part2
@@ -0,0 +1,13 @@
+#!/usr/bin/env ruby
+
+input = gets.chomp.chars.map(&:to_i)
+l = input.length
+r = l / 2
+
+sum = 0
+
+(0...l).each do |i|
+  sum += input[i] if input[i] == input[(i + r) % l]
+end
+
+puts sum
-- 
cgit v1.2.3