#!/bin/env ruby
require 'pry'
numbers = File.read('./input').split("\n").map(&:to_i).sort

solution = numbers.map.with_index do |num, i|
    next if i == 0
    num - numbers[i-1]
end
#binding.pry
final = [solution.count(1)+1, solution.count(3)+1]
pp final, final.reduce(&:*)