g=int(input())
l=list(range(g+1))
b=[bin(x).count('1') for x in l]
s=[1]
x,c,a=1,0,0
for i in l:
	n=x+b[x]
	if n>g: n=1
	p=x-b[x]
	if p<1: p=1
	if l[n] not in s: x=n
	elif l[p] not in s: x=p
	else: a=-1; break
	s+=[x]
	if x==g: a=len(s); break
print(a)