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