Bluff! Just a Bluff. I surprised when I got
accepted this problem. This can be a very easy problem if you
know the hidden. Use the library function sqrtl(). Though the
turboc 3.0 show it as a dos compatible function only and the
CYGNU compiler do not support it but the 24-hour judge support
the function surprisingly.
N.B.: Remember this is a
blue flag problem.
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