def step(num):
    res = 0
    if num in step.res_dict:
        return step.res_dict.get(num)
    while True:
        res += num % 2
        num //= 2
        if num == 0:
            break
    step.res_dict[num] = res
    return res
step.res_dict = {}

N = int(input())
m = 1
cnt = 0
while True:
    next = step(m)
    cnt += 1
    if N < m + next:
        m -= next
    elif N > m + next:
        m += next
    else:
        m += next
        cnt += 1
        print(cnt)
        break
    if cnt > N + N // 2:
        print(-1)
        break