object Main {
    def main(args: Array[String]): Unit = {
        val l : Int = readLine().toInt
        val n : Int = readLine().toInt
        var now : Int = 0
        var count : Int = 0
        for(w <- (readLine().split(' ').map(_.toInt).sorted :+ l+1)){
            now += w
            if(now > l){
                println(count)
                return
            }
            count += 1
        }
    }
}