From b1692f98b614e731cd42fc770dff77e2f3c136ff Mon Sep 17 00:00:00 2001
From: Nat Lasseter <user@4574.co.uk>
Date: Sun, 1 Dec 2019 11:15:09 +0000
Subject: Day 1 complete

---
 day01/part2 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100755 day01/part2

(limited to 'day01/part2')

diff --git a/day01/part2 b/day01/part2
new file mode 100755
index 0000000..6f70fe7
--- /dev/null
+++ b/day01/part2
@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+
+def fuel_required(mass)
+  fuel_queue = [mass]
+
+  loop do
+    new_fuel = (fuel_queue.last / 3) - 2
+    return (fuel_queue.sum - mass) if new_fuel <= 0
+    fuel_queue << new_fuel
+  end
+end
+
+input = $stdin.readlines.map(&:strip).map(&:to_i)
+
+puts input.map{ |x| fuel_required(x) }.sum
-- 
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