package main

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

var sc = bufio.NewScanner(os.Stdin)

func Scanner() string {
	sc.Scan()
	return sc.Text()
}

func main() {
	buf := make([]byte, 0)
	sc.Buffer(buf, 100000007)
	sc.Split(bufio.ScanWords)
	l, _ := strconv.Atoi(Scanner())
	n, _ := strconv.Atoi(Scanner())
	w := make([]int, n)
	for i := 0; i < n; i++ {
		w[i], _ = strconv.Atoi(Scanner())
	}

	sort.Sort(sort.IntSlice(w))

	ans := 0
	for i := 0; i < n; i++ {
		l -= w[i]
		if l < 0 {
			break
		} else {
			ans++
		}
	}
	fmt.Println(ans)
}