(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((n (read))
         (v (make-array n :element-type 'integer))
         (w (make-array n :element-type 'integer))
         (s 0)
         (dp (make-array 101010 :element-type 'integer :initial-element 0)))
    (dotimes (i n)
      (let* ((vi (read))
             (wi (read)))
        (setf (aref v i) vi
              (aref w i) wi
              s (+ s wi))))
    (let* ((v-max (read)))
      (dotimes (i n)
        (loop for j from (1+ s) downto (aref w i) do
              (setf (aref dp j) (max (aref dp j) (+ (aref dp (- j (aref w i))) (aref v i))))))
      (dotimes (i s)
        (when (= v-max (aref dp (1+ i)))
              (format t "~d~%" (1+ i))
              (return)))
      (if (= v-max (aref dp (1+ s)))
          (format t "inf~%")
          (loop for i from s downto 1 do
                (when (= v-max (aref dp i))
                      (format t "~d~%" i)
                      (return)))))))

(main)