#!/bin/env ruby #Find the three entries that sum to 2020; what do you get if you multiply them together? numbers = File.readlines('./input') numbers.map! { |s| s.to_i} numbers.each do |num1| numbers.each do |num2| numbers.each do |num3| sum = num1 + num2 + num3 puts num1.to_s + '+' + num2.to_s + '+' + num3.to_s + '=' + sum.to_s if sum == 2020 puts num1 * num2 * num3 exit end end end