#!/bin/env ruby
#Find the two entries that sum to 2020; what do you get if you multiply them together?

numbers = File.readlines(./input)
numbers.each do |num1|
    numbers.each do |num2|
        sum = num1 + num2
        puts num1 + '+' num2 '=' sum
        if sum == 2020
            puts num1 * num2
            exit
        end
    end
end