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