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Then the sample input doesn't make sense. If the two viruses stick to corners opposing each other, then the distance will be:
sqrt(sqr(9.1)+sqr(9.1)) = 12.8693



The original virus are divided into two small viruses with equal r,
<h>without loss of total area<h>

so after fussion, r = sqrt(2)*0 ...

huh..i'm also puzzled about this.
hope anyone can answer

well, i think there should be no problem with java itself. The message is probablly provided by our source editor.
You can test the *real* output by piping the result to a file.
under dos, type:

java main >108.out

then type

type 108.out

to see the output

Can somebody put out any links or guides to the effective use of C++ input/output in ACM ICPC contest?

TIA!

Can somebody put out any links or guides to the effective use of C++ input/output in ACM ICPC contest?

TIA!

I keep getting W.A for this problme.
Could somebody clear my following doubts:
1) If there is only 1 point, say,, (0,, 0)
what should the output be?
2) If all the input points are collinear,
say (1, 0), (2, 0), (3, 0), (4, 0)
what should the output be?

thanks a lot!