Envío 3211

Código

n1 = gets.chomp
n2 = gets.chomp

def sum_numbers a, b
  accumulator = 0
  size = [a.length, b.length].max
  a = a.rjust(size, "0")
  b = b.rjust(size, "0")
  answer = '0' * size

  (size - 1).downto(0).each do |index|
    current_digit = a[index].to_i + b[index].to_i
    current_digit = current_digit + accumulator
    answer[index] = (current_digit % 10).to_s

    accumulator = current_digit / 10
  end

  if accumulator != 0
    answer[0] = accumulator.to_s
  end

  answer
end

puts sum_numbers n1, n2