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    #跟帖#  回复:Fun Probability Question 来源: TCT [脑筋急转] - AceOnRiver(773 bytes ) 2009-11-12
    #跟帖#  13!/(2!2!2!2!)-4*12!/(2!2!2!)+6*11!/(2!2!)-4*10!/2!+9! [脑筋急转] - AceOnRiver(56 bytes ) 2009-11-05
    #跟帖#  回复:回复:回复:印尼奥赛题(1星)to aceonriver [脑筋急转] - AceOnRiver(96 bytes ) 2009-11-05
    #跟帖#  回复:印尼奥赛题(1星) [脑筋急转] - AceOnRiver(350 bytes ) 2009-11-04
    #跟帖#  Correction [脑筋急转] - AceOnRiver(188 bytes ) 2009-11-03
    #跟帖#  回复:IBM 11月:猜因子(2.5星) [脑筋急转] - AceOnRiver(620 bytes ) 2009-11-03
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