(use srfi-42)
(define (round-up-on-5 x) (truncate->exact (+ x (/ 1 2))))
(define (comp-min-a+b a0 b0 . max-a-b-opt)
    (let ((max-a-b (get-optional max-a-b-opt 500)))
        (min-ec
            (: a max-a-b)
            (: b max-a-b)
            (:let s (+ a b))
            (not (= s 0))
            (and
                (= a0 (round-up-on-5 (/ (* 100 a) s)))
                (= b0 (round-up-on-5 (/ (* 100 b) s))))
            s)))
(let* ((a0 (read)) (b0 (read)))
    (print (comp-min-a+b a0 b0)))