#!/mnt/c/Users/moiki/bash/env/bin/python
# N,M = map(int, input().split())
N = int(input())
dp = [10**9 for _ in range(N+1)]

dp[1] = 1
stack = [1]
while stack:
    i = stack.pop()
    cnt = bin(i).count("1")
    if 1 <=  i-cnt  <= N:
        if dp[i]+1 < dp[i-cnt] :
            if not (i-cnt) in stack:
                stack.append( i-cnt )
            dp[i-cnt] = dp[i]+1
            
    if 1 <= i+cnt  <= N:
        if dp[i]+1 < dp[i+cnt] :
            if not (i+cnt) in stack:
                stack.append( i+cnt )
            dp[i+cnt] = dp[i]+1

print(dp[N] if dp[N] != 10**9 else -1)