#!/usr/bin/env ruby

require_relative '../common'

RANGE = '372037-905157'

def part1
  first, last = RANGE.split('-')
  (first..last).count do |password|
    password = password.to_s
    password.chars == password.chars.sort &&
      password.match?(/(.)\1/)
  end
end

def part2
  first, last = RANGE.split('-')
  (first..last).count do |password|
    password = password.to_s
    password.chars == password.chars.sort &&
      password.chars.group_by(&:itself).any? { |_,v| v.size == 2 }
  end
end

puts "=== Part 1 ==="
puts part1
puts "=== Part 2 ==="
puts part2