import queue

n = int(input())
q = queue.Queue()

mp = [10 ** 6] * n
q.put(0)
mp[0] = 1

while(not q.empty()):
    val = q.get()
    b = bin(val + 1).count('1')

    if val + b < n and mp[val] + 1 < mp[val + b]:
        mp[val + b] = mp[val] + 1
        q.put(val + b)
    if val - b > 0 and mp[val] + 1 < mp[val - b]:
        mp[val - b] = mp[val] + 1
        q.put(val - b)

if mp[n - 1] < 10 ** 6:
    print(mp[n - 1])
else:
    print(-1)