刘老师，P278半平面交倒数第4行为什么要计算首尾两个半平面的交点?

lixiaojun2914 / aoapc-book

Automatically exported from code.google.com/p/aoapc-book

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Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago

如果这个交点是无效的呢?

Original issue reported on code.google.com by yingsi...@gmail.com on 19 Mar 2013 at 12:49

GoogleCodeExporter commented 8 years ago

像ZJOI2008瞭望塔那题，我把那句话删了就AC了

Original comment by yingsi...@gmail.com on 20 Mar 2013 at 11:20