#!/usr/bin/env PyPy3

from collections import Counter, defaultdict, deque
import itertools
import re
import math
from functools import reduce
import operator
import bisect
from heapq import *
import functools

mod=10 ** 9 + 7

import sys
input = sys.stdin.readline
def popcount(x):
    x -= (x >> 1) & 0x55555555
    x = (x & 0x33333333) + ((x >> 2) & 0x33333333)
    x = (x + (x >> 4)) & 0x0f0f0f0f
    x += x >> 8
    x += x >> 16
    return x & 0x3f
def popcount_parity(x):
    x ^= x >> 1
    x ^= x >> 2
    x ^= x >> 4
    x ^= x >> 8
    x ^= x >> 16
    return x & 1
n = int(input())
INF = 1 << 31
dist = [INF] * (n + 1)
dist[1] = 1
go = deque([1])
while go:
    now = go.pop()
    p = popcount(now)
    if now - p > 0:
        if dist[now - p] != INF:
            dist[now - p] = dist[now] + 1
            go.appendleft(now-p)
    if now + p <= n:
        if dist[now + p] != INF:
            dist[now + p] = dist[now] + 1
            go.appendleft(now+p)
if dist[n] == INF:
    print(-1)
else:
    print(dist[n])