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我也坑爹了!!!!

Posted by ip96cns at 2011-03-27 13:26:34 on Problem 1273
In Reply To:这题有点阴险,可能出现两条相同边! Posted by:200892458 at 2009-11-05 20:41:33
 rt...数据有平行边 所以...
  ....+=....

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