Solved Day 10

day10/input

@@ -0,0 +1 @@
+3113322113

day10/input.testing

@@ -0,0 +1 @@
+1

day10/solution.rb

@@ -0,0 +1,44 @@
+#!/bin/env ruby
+require 'pry'
+
+input = File.read('./input').strip
+
+# BADBADBAD takes sooooooo long at big numbers
+# def look_and_say(sequence)
+#     sequence += 'E'
+#     result = ''
+#     sequence.chars.each_with_index do |num, i|
+#         next if result[-1] == num or num == 'E'
+#         n = i
+#         while sequence.chars[i..n].uniq.count == 1
+#             n += 1
+#         end
+#         result += (n - i).to_s
+#         result += num
+#     end
+#     result
+# end
+
+# Stole this :(
+def look_and_say(number)
+  result = ''
+  i = 0
+  while i < number.length
+    c = number[i]
+    j = i
+    j += 1 while j < number.length && number[j] == c
+    result << "#{j - i}#{c}"
+    i = j
+  end
+  result
+end
+
+# Change to 40 times for part 1
+sequences = [input]
+50.times do |i|
+  puts "Run #{i} is #{sequences[-1].length}"
+  sequences.push(look_and_say(sequences[-1]))
+end
+
+puts "Part 2 Solution: #{sequences[-1].length}"
+# binding.pry