d,s,v = int(input()), 0, []
while s < d: v.append(len(v)+1); s = sum([bin(i).count("1",2) for i in v])
v = v[::-1]
for i in range(len(v)): 
    if bin(v[i]).count("1",2) == s-d: v.remove(v[i]); break
print(len(v)), [print(x, end=" ") for x in v]