# 再帰呼び出し

N = int(input())
queue = {"count":1, "position":1}
passed_position = {1}

def get_count(q):
    current_position = q["position"]
    current_count = q["count"]

    if current_position == N:
        return current_count
    elif current_position < N:
        steps = bin(current_position).count("1")

        forward_position = current_position + steps
        backward_position = current_position - steps

        if forward_position not in passed_position and 1 < forward_position <= N:
            passed_position.add(forward_position)
            return get_count({"count":current_count+1, "position":forward_position})
        if backward_position not in passed_position and 1 < backward_position <= N:
            passed_position.add(backward_position)
            return get_count({"count":current_count+1, "position":backward_position})

result = get_count(queue)
print(result if result else -1)