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tql! 我也是错在这儿，但为什么啊

Posted by lanzongwei at 2020-03-14 11:26:16 on Problem 3335
In Reply To:WA了的有可能是这种情况： Posted by:20181gdgzoi236 at 2019-07-05 08:11:12 
改完之后A了，但当线和之前交点在同一条直线时之前那线应该没用啊，不明白，dalao能解惑下吗
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