(define l (read))
(define m (read))
(define n (read))
(let loop ((ans 0) (s (+ (* l 100) (* m 25) n)))
  (cond ((>= s 1000) (loop ans (mod s 1000)))
        ((>= s 100) (loop (div s 100) (mod s 100)))
        ((>= s 25) (loop (+ ans (div s 25)) (mod s 25)))
        (else (print (+ ans s)))))