package main

import (
	"fmt"
	"os"
	"bufio"
	"strconv"
	"sort"
)

func main() {
	var L, N int
	fmt.Scan(&L)
	fmt.Scan(&N)
	w := make([]int, N)
	for i:=0;i<N;i++{
		w[i] = int(nextInt())
	}
	sort.Sort(sort.IntSlice(w))
//	fmt.Println(w)
	z := 0
	ans := 0
	for _, x := range w{
		z += x
		if z > L{
			break
		}else{
			ans += 1
		}
	}
	fmt.Println(ans)
}

var s = bufio.NewScanner(os.Stdin)
func next() string {
	s.Split(bufio.ScanWords)
	s.Scan()
	return s.Text()
}

func nextInt() int64 {
	i, e := strconv.Atoi(next())
	if e != nil {
		panic(e)
	}
	return int64(i)
}