package main

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

func main() {
	var L, N int
	fmt.Scan(&L, &N)
	W := make([]int, N)
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	for i := range W {
		sc.Scan()
		W[i], _ = strconv.Atoi(sc.Text())
	}
	sort.Ints(W)
	ans := 0
	for i := range W {
		if L-W[i] >= 0 {
			L -= W[i]
			ans++
		} else {
			break
		}
	}
	fmt.Println(ans)
}