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用"对踵点"可调出o(n)的时间,我也是一直WA，求O（N）的时间代码。。。。。。。In Reply To:关于这道题 Posted by:KosonLau at 2007-04-26 14:46:30 > 忙活了一天一夜,终于搞定,用graham,极角排序用堆实现,123ms, 一开始因为一个判断条件没写WA了无数次. > 网上看到说可以不用枚举用"对踵点"可调出o(n)的时间,可就是一直WA,调不出来.还发现用包裹壳法会超时,因为会有所有点都在凸包上的情况. Followed by: Post your reply here: |
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