def solve(N):
    if N==0:
        return None

    X=[(2**d,2**(d+1)-1) for d in range(60)][::-1]
    alpha=0
    A=[]

    for p,x in X:
        if alpha&p!=N&p:
            A.append(p)
            alpha^=x
    return A[::-1]

N=int(input())

A=solve(N)
if A==None:
    print(-1)
else:
    print(len(A))
    print(*A)