Day 8

2023/day8/p1.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+f = File.open('./2023/day8/data')
+directions = f.readline.strip.split('')
+
+graph = {}
+f.each_line do |line|
+  line.strip!
+  next if line.empty?
+
+  graph[line.split(' ')[0]] = line.split('(')[1].split(')')[0].split(', ')
+end
+
+i = 0
+res = 0
+cur_pos = 'AAA'
+while cur_pos != 'ZZZ'
+  i = 0 if i == directions.length
+
+  cur_pos = graph[cur_pos][0] if directions[i] == 'L'
+  cur_pos = graph[cur_pos][1] if directions[i] == 'R'
+  i += 1
+  res += 1
+end
+
+puts res