#!/usr/bin/env gosh

(define (how-meny l ws)
  (let loop ([i 0][sum 0][w (car ws)][wr (cdr ws)])
    (if (> (+ sum w) l) i
	(loop (+ i 1) (+ sum w) (car wr) (cdr wr)))
    
    )
  )

(define (main _)
  (let* ([l (read)])
    (read)(read-char)
    (let ([ws (sort
	       (map (^x (string->number x))
		    (string-split (read-line) " ")))])
      (display (how-meny l ws))
      ))
  (newline)
  0)