#!/usr/bin/env ruby

def generate(value, factor)
  (value * factor) % 2147483647
end

line_1, line_2 = STDIN.read.chomp.split("\n").to_a
generator_a_start = line_1.gsub("Generator A starts with ", "").to_i
generator_b_start = line_2.gsub("Generator B starts with ", "").to_i

a_factor = 16807
b_factor = 48271

a = generator_a_start
b = generator_b_start
pairs = 0

40000000.times do
  a = generate(a, a_factor)
  b = generate(b, b_factor)
  pairs += 1 if (a & 65535 == b & 65535)
end

puts "Part 1: #{pairs}"

a = generator_a_start
b = generator_b_start
pairs = 0

5000000.times do
  a = generate(a, a_factor)
  a = generate(a, a_factor) until (a % 4) == 0
  b = generate(b, b_factor)
  b = generate(b, b_factor) until (b % 8) == 0
  pairs += 1 if (a & 65535 == b & 65535)
end

puts "Part 2: #{pairs}"