package main

import (
	"fmt"
	"sort"
)

func main() {
	var l, n int
	var w []int
	fmt.Scan(&l, &n)

	var t int
	for i := 0; i < n; i++ {
		fmt.Scan(&t)
		w = append(w, t)
	}
	sort.Ints(w)

	var crt, cnt int
	for _, v := range w {
		if crt+v > l {
			break
		}
		cnt++
		crt += v
	}
	fmt.Println(cnt)
}