package main

import (
	"fmt"
	"sort"
)

func main() {
	var L, N int
	fmt.Scan(&L, &N)
	W := make([]int, N)
	for i := range W {
		fmt.Scan(&W[i])
	}
	sort.Ints(W)
	var ans int
	for i := 0; i < N; i++ {
		if L >= W[i] {
			L -= W[i]
			ans++
		} else {
			break
		}
	}
	fmt.Println(ans)
}