N = input()
v = [N+1]*N
v[0] = 1
Q = [0]
while Q:
	h = Q.pop(0)
	if h == N-1:
		print v[h]
		break
	m = bin(h+1).count("1")
	c = v[h]+1
	for nh in [h-m,h+m]:
		if -1 < nh < N and v[nh] > c:
			Q.append(nh)
			v[nh] = c
else:
	print -1