import java.util.Scanner
import java.io.{BufferedReader,InputStreamReader}
import scala.collection.mutable.ListBuffer
object no5{
    def main(args:Array[String]):Unit={
        val scan = new Scanner(System.in)
        val w = scan.nextInt
        val n = scan.nextInt
        var list:ListBuffer[Int] = ListBuffer[Int]()
        for(i <- 1 to n ) list += scan.nextInt
        list = list.sorted
        var res = 0
        var sum = 0
        do{
            sum += list(res)
            res += 1
        }while(sum <= w && res < n)
        if(w < sum) println(res-1) else println(res)
    }
}