import sys
import collections

input = sys.stdin.readline


def main():
    N = int(input())

    dist = [None] * (N+1)
    dist[1] = 1

    Q = collections.deque([1])

    while len(Q) > 0:
        x = Q.popleft()

        if x == N:
            print(dist[x])
            return

        b = x.bit_count()

        for v in [x-b, x+b]:
            if 1 <= v <= N and dist[v] is None:
                dist[v] = dist[x] + 1
                Q.append(v)

    print(-1)


if __name__ == '__main__':
    main()