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半平面交……写了200行终于ac了……留一组恶心的数据

Posted by xuhaoran510 at 2011-06-25 11:26:43 on Problem 3384 
Input
4 1
0 0
0 2
2 2
2 0

Output
1.0000 1.0000 1.0000 1.0000

这组数据里求出的半平面交退化成了一个点……
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