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哦,明白了,比赛时没想到,当时感觉和1742Coins有点像

Posted by pku_ghost at 2007-08-29 14:45:01 on Problem 3370
In Reply To:不是 如果要分类的话应该说是抽屉原理 Posted by:TheBeet at 2007-08-29 14:36:15 
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