n = int(input())

prev = [[1, []]]
end_flag = False
c = 1

while len(prev) != 0:
	next = []
	for p in prev:
		if p[0] == n:
			print(c)
			end_flag = True
			break
		b = bin(p[0])[2:].count("1")
		for i in range(2):
			next_place = p[0] + b * (-1) ** i
			if 1 <= next_place <= n and not next_place in p[1]:
				next.append([next_place,  p[1] + [p[0]]])
	if end_flag:
		break
	c += 1
	prev = next
	
else:
	print(-1)