(define ans 0)
(define n (read))
(define l (list))
(let loop((i n))
	(set! l (cons (read) l))
	(if (> i 1) (loop (- i 1))))
(define (countnum ls num retnum)
	(if (pair? ls)
		(countnum (cdr ls) num (if (= (car ls) num) (+ retnum 1) retnum))
		retnum))
(let loop((i 1))
	(if (<= ans (countnum l i 0)) (set! ans i))
	(if (< i 6) (loop (+ i 1))))
(display ans)
(newline)