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我不会计算几何，不会扫描线。我想做得简单一点,看看有没luck，避开扫描线，直接求交集，因为集合数量太多，不是RE，就是MLE.....这题数据没有传说这么弱。。） 看来为了过这题，我要从头学习“扫描线”这个dd.... Followed by:
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