回复：有没有好办法？

来源: 于 2012-01-06 17:03:28 [旧帖] [给我悄悄话] 本文已被阅读：次

If we can have a lot of "secnod "s ,answer is 2009-1004=1005,...Otherwise,...2009-1005=4

So,005 or 004 is answer.