回答: -- there is AT LEAST ONE solution.肖庄2011-12-17 23:49:18

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LOL. It is a 〉= problem, isn't it? -肖庄- 给 肖庄 发送悄悄话 肖庄 的博客首页 (0 bytes) () 12/18/2011 postreply 00:43:59

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