package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

func main() {
	var sc = bufio.NewScanner(os.Stdin)
	sc.Scan(); l, _ := strconv.Atoi(sc.Text())
	sc.Scan(); n, _ := strconv.Atoi(sc.Text())
	sc.Split(bufio.ScanWords)
	ws := make([]int, n)
	for i := 0; i < n; i++ {
		sc.Scan(); w, _ := strconv.Atoi(sc.Text())
		ws[i] = w
	}
	sort.Ints(ws)

	ans := 0
	for _, w := range ws {
		if nl := l - w; nl >= 0 {
			l = nl
			ans += 1
		}
	}

	fmt.Println(ans)
}