package main

import (
	"fmt"
	"sort"
)

func main() {
	var L, N int
	fmt.Scan(&L)
	fmt.Scan(&N)
	w := make([]int, N)
	for i := 0; i < N; i++ {
		fmt.Scan(&w[i])
	}
	sort.Sort(sort.IntSlice(w))
	//	fmt.Println(w)
	z := 0
	ans := 0
	for _, x := range w {
		z += x
		if z > L {
			break
		} else {
			ans += 1
		}
	}
	fmt.Println(ans)
}