import math
def divisor(n):
  L, R = [1], [n]
  last = math.floor(n ** 0.5)
  for i in range(2, last + 1):
    if n % i == 0:
      L.append(i)
      if i != n // i:
        R.append(n // i)
  return sum(L + R[::-1])

N = int(input())

if N == 0:
  print(-1)
  exit()

a = []
while N > 7:
  b = N - 1
  while True:
    x = divisor(b)
    if len(bin(x)) == len(bin(N)):
      break
    b -= 1
  a.append(b)
  N ^= x

if N >= 4:
  a.append(3)
  N ^= 4
if N == 1:
  a.append(1)
elif N == 2:
  a.append(2)
  a.append(1)
elif N == 3:
  a.append(2)

print(len(a))
print(*a)