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这个题直接找出有多少个入度为零的点,行不行?帮忙找个反例,脑子不好使

Posted by sunmoonstar_love at 2005-08-01 15:59:44 on Problem 1422
In Reply To:zju数据向来弱的...我有好多pas以前在zju过,在这里都有问题:) Posted by:LiHaoyuan at 2005-08-01 11:08:51


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