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这么水的凸包咋还那么多人抱怨~开始还以为多组数据需要重复的判 0 0 原来就一组啊。 做法很简单 ： 排序->扫描->拉成一条链->找（0，0）->输出n个坐标->AC Followed by: Post your reply here: |
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