n=int(input())
ps=[1]
cnt=1
log=set([1])
while n not in ps:
    nps=[]
    for p in ps:
        dp=format(p,"b").count("1")
        np=p+dp
        if 0 < np < n + 1 and np not in log:
            nps+=[np]
            log.add(np)
        np=p-dp
        if 0 < np < n + 1 and np not in log:
            nps+=[np]
            log.add(np)
    if len(nps)==0:
        cnt=-1
        break
    cnt+=1
    ps=nps
print(cnt)