N = int(raw_input())
queue = [1,1]
path = [False for i in range(N)]
ans = -1
while len(queue) > 0:
	now,count= queue.pop(0),queue.pop(0)
	path[now - 1] = True
	if now == N:
		ans = count
		break
	s = str(bin(now)).count('1')
	if s == 0:continue
	next1 = now + s
	next2 = now - s
	if not(next1 > N or path[next1 - 1]):
		queue.append(now + s)
		queue.append(count + 1)
	if not(next2 <= 0 or path[next2 - 1]):
		queue.append(now - s)
		queue.append(count + 1)
print ans