N=int(input())
dp=[float("inf")]*(N+1)
dp[1]=1;dp[0]=-1
from collections import deque
q=deque([1])
while q:
    i=q.popleft()
    if dp[i]>=1:
        a=str(bin(i))
        a=a.count("1")
        try:
            if dp[i+a]==float("inf"):
                q.append(i+a)
            dp[i+a]=min(dp[i]+1,dp[i+a])
        except IndexError:
            pass
        try:
            if dp[i-a]==float("inf"):
                q.append(i-a)
            dp[i-a]=min(dp[i]+1,dp[i-a])
        except IndexError:
            pass
print(dp[N] if dp[N]!=float("inf") else -1)