Solution for Day 10

2020-12-10 09:22:27 +01:00
parent 89090cb0f4
commit 83f4f0b6c6
3 changed files with 133 additions and 0 deletions
--- a/day_10/second.rb
+++ b/day_10/second.rb
@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+input = File.readlines('./input').map(&:to_i).sort
+
+input << input.max + 3
+
+$c = { 0 => 1 }
+
+input.each do |e|
+  $c[e] = $c.values_at(e - 1, e - 2, e - 3).compact.sum
+end
+puts $c[input.last]