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请问答案对吗?

Posted by encapsulation at 2006-07-30 17:05:58 on Problem 2098 
11
-2 3 -2 11 1 7 -5 7 1 1

-2 3 -2 11 1 7 -5 7 1 2

0 0 1 1 4 5 6 8 3 9

1000 1000
-1000 1000
1 2
3 5
7 7


100 100
-100 -100
40 30
70 28
51 24

56.995700
48.293513
124.306536
IMPOSSIBLE
IMPOSSIBLE
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