from collections import deque
N = int(input())
INF = 10**18
dist = [INF]*(N+10)
dist[1] = 0
q = deque()
q.append(1)
while q:
    now = q.popleft()
    cnt = 0
    for i in range(20):
        if (1<<i)&now:
            cnt += 1
    if now-cnt >= 1:
        if dist[now-cnt]==INF:
            dist[now-cnt] = dist[now]+1
            q.append(now-cnt)
    if now+cnt <= N:
        if dist[now+cnt]==INF:
            dist[now+cnt] = dist[now]+1
            q.append(now+cnt)

if dist[N]==INF:
    print(-1)
    exit()
print(dist[N]+1)