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AC了，居然会这样...L这题似乎有精度问题

Posted by fjnu_jxd_001 at 2005-09-09 20:32:56 on Problem 2610 
    算距离的时候，用sqrt后就过了，用原来的准确值反而会WA。
    或者是不是我有没考虑的？

p.s.
    这题真是一波三折啊……
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