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轻松一次AC 哈哈轻松一次AC 哈哈 非常感谢沈洋同学的提示！ 枚举所有端点的连线，判断是否穿过其它直线。如果是，该条直线的任意一条垂线就满足条件。 具体证明不再赘述了 Followed by: Post your reply here: |
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