N=int(input())
a=1
b=1
c=[1]
d=[]
if N==1:
    print(1)
else:    
    while b!=N:
        d=c
        d=list(set(d))
        for i in range(0,len(c)):
            e=bin(c[i]).count("1")
            p=c[i]+e 
            q=c[i]-e
            if p<=N:
                c.append(p)
            if q>0:
                c.append(q)
        a+=1
        c=list(set(c))
        if N in c:
            print(a)
            break
        if c==d:
            print(-1)
            break