import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

from collections import deque

N = int(read())

INF = 10 ** 9
dist = [INF] * (N+1)
dist[1] = 0
q = deque([1])
while q:
    v = q.popleft()
    d = str(bin(v)).count('1')
    for y in [v-d,v+d]:
        if not(1<=y<=N):
            continue
        if dist[y] != INF:
            continue
        q.append(y)
        dist[y] = dist[v] + 1

answer = dist[-1] + 1
if answer > INF:
    answer = -1
print(answer)