def bc(n):
    c=0
    while n:
        if n%2:
            n-=1
            c+=1
        n=int(n/2)
    return c

n=int(input())
b=[bc(i+1) for i in range(n)]
c=[9999999 for i in range(n)]
c[0]=1
v=1
while(v):
    v=0
    for j in range(n):
        if j-b[j]>=0 and c[j-b[j]]>c[j]+1:
            v=1
            c[j-b[j]]=c[j]+1
        if j+b[j]<n and c[j+b[j]]>c[j]+1:
            v=1
            c[j+b[j]]=c[j]+1
if c[n-1]<n+1:
    print(c[n-1])
else:
    print(-1)