(define l (string->number (read-line))) ;箱の幅
(define n (string->number (read-line)));ブロックの数
(define w (sort (map string->number (string-split (read-line) " "))))

(print (let loop ((b (car w)) (lst (cdr w)) (h l) (cnt 0))
         (if (>= b h)
              cnt
             (loop #?=(+ b (car lst)) (cdr lst) h (+ cnt 1)))))