if __name__ == "__main__":
	L = int(input())
	N = int(input())
	W = sorted(list(map(int, input().split())))
	
	count = 0
	sum = 0
	
	for i in W:
		count += 1
		sum += i
		if sum > L:
			count -= 1
			break
		
	print(count)