N = int(input())
root = [-1] * (N + 1)
bitmap = [0]
for i in range(1, N+1):
    tmp = bin(i)
    bitmap.append(tmp.count('1'))

pos = 1
count = 1
root[pos] = 1
while True:
    if pos + bitmap[pos] > N:
        pos = pos - bitmap[pos]
        if root[pos] == 1:
            count = -1
            break
        else:
            root[pos] = 1
            count += 1
    elif pos + bitmap[pos] < N:
        pos = pos + bitmap[pos]
        if root[pos] == 1:
            count = -1
            break
        else:
            root[pos] = 1
            count += 1
    else:
        count += 1
        break

print(count)