N = int(input())

def nbit(n):
    b = 0
    while 0 < n:
        b += n & 1
        n >>= 1
    return b

count = 1
current = 1
done = {}
while current != N:
    bit = nbit(current)
    next = current + bit
    count += 1
    if next == N:
        break
    elif next < N and next not in done:
        done[next] = 1
        current = next
    elif N < next and next not in done:
        done[next] = 1
        current = current - bit
    else:
        count = -1
        break
print(count)