from collections import deque


def main():
    """ main """
    N = int(input())
    dp = set()
    dp.add(1)
    q = deque([(1, 1)])
    # queueが空になるまでloopを回し、到達すればbreak and return
    while q:
        pos, cnt = q.popleft()

        if pos == N:
            print(cnt)
            break

        step = bin(pos).count('1')

        if 1 < (pos - step) and pos-step not in dp:
            dp.add(pos-step)
            q.append((pos-step, cnt+1))

        if (pos + step) <= N and pos + step not in dp:
            dp.add(pos+step)
            q.append((pos+step, cnt+1))
    else:
        print(-1)


main()