(define N (read ))
(define x (read))
(let foo ((a (- N 2 ) ) ) (if (= a 0 ) '() (let ()(read)(foo ( - a 1 ) ) )))
(define y (read))

(let ((p x )(q  y ))
  (let ((r (/ x y )))
    (display (denominator r))
    (display "/" ) 
    (display (numerator r ))
    (newline)))