fun main(  args : Array<String> ) {
  var l = readLine()!!.toInt()
  val n = readLine()!!.toInt()
  var cnt = 0
  for( s in readLine()!!.split(" ").map { it.toInt() }.sorted() ) {
    l   -= s
    cnt += 1
    if( l < 0 ) break    
  }
  println( cnt-1 )
}