n = int(input())
ans = []
xor = 0

for i in range(40, -1, -1):
    if 2 ** i > n:
        continue
    if 1 & (xor >> i) != 1 & (n >> i):
        ans.append(2 ** i)
        xor ^= 2 ** (i + 1) - 1
if n == 0:
    print(-1)
else:
    print(len(ans))
    print(*ans)