from collections import deque
N = int(input())

dp = [N + 1] * N
dp[0] = 1

distances = [0] * N
for i in range(N):
    num = i + 1
    distance = 0
    while num > 0:
        distance += num & 1
        num = num >> 1
    distances[i] = distance

q = deque()
q.append(0)
i = 0
while len(q) > 0:
    i = q.pop()
    num = i + 1
    back = i - distances[i]
    front = i + distances[i]
    if back >= 0 and dp[back] > dp[i] + 1:
        dp[back] = dp[i] + 1
        q.append(back)
    if front < N and dp[front] > dp[i] + 1:
        dp[front] = dp[i] + 1
        q.append(front)
        
if dp[N - 1] == N + 1:
    print(-1)
else:
    print(dp[N - 1])