from collections import deque
N = int(input())
a = list((bin(i).count("1") for i in range(N+1)))
inf = float("inf")
dp = [inf, 1] + [inf]*(N+100)

dq = deque([(1, 1)])
pop, append = dq.pop, dq.append

while dq:
    v, steps = pop()
    if v == N:
        continue
    back, forward = v-a[v], v+a[v]
    steps += 1
    if dp[back] > steps:
        dp[back] = steps
        append((back, steps))
    if N >= forward and dp[forward] > steps:
        dp[forward] = steps
        append((forward, steps))


print(dp[N] if dp[N] < inf else -1)