From d21e58f81d28b4e411f1188b1fa065b99e24378b Mon Sep 17 00:00:00 2001
From: Nat Lasseter <Nat Lasseter nathan@bytemark.co.uk>
Date: Tue, 5 Dec 2017 09:35:09 +0000
Subject: Day05

---
 day05/part2 | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100755 day05/part2

(limited to 'day05/part2')

diff --git a/day05/part2 b/day05/part2
new file mode 100755
index 0000000..333d5d4
--- /dev/null
+++ b/day05/part2
@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+input = $stdin.readlines.map(&:chomp).map(&:to_i)
+pc = 0
+steps = 0
+
+while pc >= 0 && pc < input.length do
+  newpc = pc + input[pc]
+  input[pc] += input[pc] >= 3 ? -1 : 1
+  pc = newpc
+  steps += 1
+end
+
+puts steps
-- 
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