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Re:本题是我的第50题ac，纪念一下。使用方法是只有一个点入度为0，且其他结点入度为1.In Reply To:本题是我的第50题ac，纪念一下。使用方法是只有一个点入度为0，且其他结点入度为1. Posted by:einstein17 at 2010-03-15 14:32:05 你这方法不对吧 Followed by:
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