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