n=8,I got it.I made mestakes as too much number,you check my sec

所有跟帖： 

• check o1, o4, o8. o1-o8 and o1-o4 > 1 and o4-o8 < 1, -wxcfan123- ♂ (0 bytes) () 08/09/2011 postreply 18:08:30

• you are right.thx. -jinjing- ♀ (0 bytes) () 08/09/2011 postreply 18:09:58