AoC2020/day01/solution2.rb

#!/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
end