n=input()
p=[bin(x).count("1")for x in range(1,n+1)]
q=[9e9]*n
q[0]=1
step=1
nq=[0]
while len(nq):
	step+=1
	nnq=[]
	for i in nq:
		if i-p[i]>=0:
			if q[i-p[i]]>step:
				q[i-p[i]]=step
				nnq+=[i-p[i]]
		if i+p[i]<n:
			if q[i+p[i]]>step:
				q[i+p[i]]=step
				nnq+=[i+p[i]]
	nq=nnq
print[q[-1],-1][q[-1]==9e9]