The test data should be very much.

   Does the judge run my program only once
or run several times?

  My meaning is :
  If the judge run only once.
  I can generate all prime number with at most
15000 numbers.then I read a test data n, then
output the n-th prime number.
  otherwise,I must generate prime number with
at most n numbers(where n is not knew in advance)

>   The test data should be very much.
>
>    Does the judge run my program only once
> or run several times?
>
>   My meaning is :
>   If the judge run only once.
>   I can generate all prime number with at most
> 15000 numbers.then I read a test data n, then
> output the n-th prime number.
>   otherwise,I must generate prime number with
> at most n numbers(where n is not knew in advance)
>
>