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请问题目中的那个Val是干什么用的开始时以为Val是人的ID号，所以就跳过了那些已经插入线段数的人，但是一直WA。 后来不判断是否已经插入，然后就成功AC了。 看来Val不是ID号，那它到底是个什么？ Followed by: Post your reply here: |
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