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Re:单向的，而且只要能到就行，不要求路径是唯一的 而且有可能k个牛都是在同一个pasture，唉，贡献了n次wa

Posted by search_love at 2007-07-13 15:33:23 on Problem 3256
In Reply To:单向的，而且只要能到就行，不要求路径是唯一的 而且有可能k个牛都是在同一个pasture，唉，贡献了n次wa Posted by:wolfchuyan at 2007-07-13 15:28:40 
有没有回路啊？
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