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Re:用nlogn的排序的WA的注意了!~

Posted by kuailezhish at 2012-04-29 22:14:02 on Problem 2451 and last updated at 2012-04-29 22:14:39
In Reply To:用nlogn的排序的WA的注意了!~ Posted by:FuckYouFuckingMe at 2011-12-27 19:50:15

> 注意判断两个座椅重合却朝向相反的情况！遇到这种情况可以直接
> puts("0.0");exit(0);

点少于3个的时候就不能用叉积求面积了，而是0.0。参考下。

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