def main():
	l = int(input())
	n = int(input())
	li = list(map(int,input().split()))
	total = 0
	count = 0

	li.sort()
	for i in range(len(li)):
		total += li[i]
		if(l > total):
			count += 1
		i += 1

	print(count)


if __name__ == '__main__':
	main()