From a5bdbb8e5848ad44041c14dddf6bcc484d5fc4d5 Mon Sep 17 00:00:00 2001
From: Nat Lasseter <Nat Lasseter nathan@bytemark.co.uk>
Date: Mon, 4 Dec 2017 10:34:03 +0000
Subject: Day03 Part 1

---
 day03/part1 | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 day03/part1

(limited to 'day03/part1')

diff --git a/day03/part1 b/day03/part1
new file mode 100755
index 0000000..609a287
--- /dev/null
+++ b/day03/part1
@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+
+input = gets.chomp.to_i
+
+n = 0
+n += 1 while ((n*2)+1)**2 < input
+
+s = ((n*2)+1)**2
+
+d = s
+d -= n
+d -= 2*n while d > input
+d += 2*n
+
+if d - n <= input then
+  puts d - input + n
+else
+  puts input - (d - 2*n) + n
+end
-- 
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