回复：亚太奥赛题：自动驾驶仪（3.5星）

b-a=4n?

所有跟帖： 

• 证明？ -康MM- ♀ (0 bytes) () 03/26/2009 postreply 18:07:09

• Not very sure about it. -passenger101- ♂ (2196 bytes) () 03/27/2009 postreply 13:38:39

• 最后一段好像有问题 -康MM- ♀ (25 bytes) () 03/27/2009 postreply 18:40:17

• if 4|A-B, after A*B moves, it is always forward by 1. -letmeregister- ♂ (0 bytes) () 03/31/2009 postreply 08:01:54

• 想不出来原因，请指教。 -passenger101- ♂ (0 bytes) () 04/08/2009 postreply 13:37:14