Great, we want to a unique answer,have to say D=5 or D=4,...But

来源: 于 2011-01-07 12:46:27 [旧帖] [给我悄悄话] 本文已被阅读：次

We don't need say D= 5 ... and say,ROBERT is Max (or Min),The answer certainly is unique and more interesting.