import Queue

n = int(input())

def chkdigit(n):
	count = 0
	if n == 0:
		return 0
	while n:
		if n%2 == 1:
			count += 1
		n /= 2

	return count

q = Queue.Queue()

q.put([1,0])

isvisited = [0 for i in range(n)]

while not q.empty() :
	tmp = q.get()

	if tmp[0] == n:
		print tmp[1] + 1
		quit()

	a = chkdigit(tmp[0])
	if 0 < tmp[0] + a < n+1 and isvisited[tmp[0]-1] == 0 :
		isvisited[tmp[0]-1] = 1
		q.put([tmp[0] + a, tmp[1] + 1])

	if 0 < tmp[0] -a < n+1 and isvisited[tmp[0]-1] == 0:
		isvisited[tmp[0]-1] = 1
		q.put([tmp[0] - a, tmp[1] + 1])

print -1