import Queue

N = int(raw_input())
INF = float('inf')
dist = [INF] * (N + 1)

q = Queue.Queue()
q.put(1)
dist[1] = 1

while not q.empty():
	p = q.get()
	c = bin(p).count('1')
	if p - c >= 1 and dist[p - c] > dist[p] + 1:
		dist[p - c] = dist[p] + 1
		q.put(p - c)
	if p + c <= N and dist[p + c] > dist[p] + 1:
		dist[p + c] = dist[p] + 1
		q.put(p + c)

ans = dist[N]
if ans == INF: ans = -1;
print ans