#!/usr/bin/env ruby
# frozen_string_literal: true

require 'pry'

# Part 1

real_input = File.read('./input')

input = real_input

col1 = input.split("\n").map(&:split).map { |pair| pair[0].to_i }.sort
col2 = input.split("\n").map(&:split).map { |pair| pair[1].to_i }.sort

# binding.pry

solution = col1.zip(col2).map { |left, right| (right - left).abs }.sum
puts solution

# Part 2

p2 = col1.map { |value| value * col2.count(value) }.sum
puts p2