N=int(input())
a=1
d=1
e=[1]
f=[]
if N==1:
    print(1)
else:    
    while d!=N:
        for i in range(0,len(e)):
            k=list((bin(e[i])))[2:].count("1")
            if e[i]+k<=N:
                e.append(e[i]+k)
            if e[i]-k>0:
                e.append(e[i]-k)
        a+=1
        e=list(set(e))
        if N in e:
            print(a)
            break
        if e==f:
            print(-1)
            break
        else:
            f=e
            f=list(set(f))