From a13c8efb2d501ecd32ba882657f1dd207dae85d8 Mon Sep 17 00:00:00 2001
From: Nat Lasseter <Nat Lasseter nathan@bytemark.co.uk>
Date: Mon, 4 Dec 2017 10:34:16 +0000
Subject: Day04

---
 day04/part2 | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 day04/part2

(limited to 'day04/part2')

diff --git a/day04/part2 b/day04/part2
new file mode 100755
index 0000000..b9d5b72
--- /dev/null
+++ b/day04/part2
@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+
+def valid(line)
+  arr = line.split
+  (0...arr.length).each do |i|
+    perms = arr[i].chars.permutation
+    (i+1...arr.length).each do |j|
+      return false if perms.include?(arr[j].chars)
+    end
+  end
+  return true
+end
+
+input = $stdin.readlines.map(&:chomp)
+
+puts input.select { |line|
+  valid(line)
+}.length
-- 
cgit v1.2.3