Day 4

2023/day4/p1.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+res = 0
+File.foreach('./2023/day4/data') do |line|
+  winning_nums = line.split(':')[1].strip.split(' | ')[0].split(' ').map(&:to_i)
+  your_nums = line.split(':')[1].strip.split(' | ')[1].split(' ').map(&:to_i)
+  num_matches = your_nums.count { |num| winning_nums.include?(num) }
+  res += 2**(num_matches - 1) if num_matches.positive?
+end
+puts res