def CountOne(num):
    res = 0
    while num >= 1:
        if num % 2 == 1:
            res += 1
        num //= 2
    return res

n = int(input())
u = set()

res = 1
p = 1
while p != n:
    u.add(p)
    go = CountOne(p)
    if p + go <= n:
        if (p + go) not in u:
            p += go
        else:
            if (p - go) not in u:
                p -= go
            else:
                res = -1
                break
    else:
        if (p - go) not in u:
            p -= go
        else:
            res = -1
            break
    res += 1

print(res)