n=int(input())
g=[set()for i in range(n)]
for i in range(n):
    c=f"{i+1:b}".count("1")
    if i-c>=0:g[i-c]|={i}
    if i+c<n:g[i+c]|={i}
v=[-1]*n
v[-1]=1
s=[(n-1,1)]
i=p=0
while i<=p:
    for j in g[s[i][0]]:
        if v[j]<0:v[j]=s[i][1]+1;s+=(j,v[j]),;p+=1
    i+=1
print(v[0])