lines = File.read("day2.txt").lines.map(&.split(",").map(&.to_i32)).flatten
def run(lines, noun, verb)
  lines[1] = noun
  lines[2] = verb
  pos = 0
  loop do
    case lines[pos]
    when 1
      lines[lines[pos+3]] = lines[lines[pos+1]] + lines[lines[pos+2]]
      pos += 4
    when 2
      lines[lines[pos+3]] = lines[lines[pos+1]] * lines[lines[pos+2]]
      pos += 4
    when 99
      break
    end
  end
  lines[0]
end
100.times do |noun|
  100.times do |verb|
    if run(lines.dup, noun, verb) == 19690720
      puts 100*noun + verb 
      break
    end
  end
end