回复：回复：回复：C H A G E　ＦＲＯＭ 3)

来源: 于 2010-02-06 17:17:37 [旧帖] [给我悄悄话] 本文已被阅读：次

it was by assuming no shotting in the air is allowed.

now here is a tricky add-on: what the solution is if shotting in the air is allowed?