package main

import (
	"fmt"
	"sort"
)

func main() {
	var L, n int
	fmt.Scan(&L, &n)

	var w []int
	for range make([]struct{}, n) {
		var tmp int
		fmt.Scan(&tmp)
		w = append(w, tmp)
	}
	sort.Ints(w)

	ans := 0
	for _, v := range w {
		if v <= L {
			ans += 1
			L -= v
		}
	}
	fmt.Println(ans)
}