(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((xp (read))
         (yp (read))
         (ans 0))
    (loop (when (> (* ans ans) (+ (* 4 xp xp) (* 4 yp yp)))
                (return))
          (incf ans))
    (format t "~d~%" ans)))

(main)