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wa的试试这个数据

Posted by Arial at 2007-10-11 20:55:11 on Problem 1758
Try this test case:

4 0
0 0
0 3
3 0
2 0

The answer should be 8.61.

You have to find a solution with non-zero area, but the original 
polygon's vertices may lie on the same line.

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