I don't know why,
If I write 'to trunc(sqrt(n))' ,it's wa,
but if I write 'to trunc(sqrt(n))+100' ,it's ac.
So, if you got wa ,you can try it ,may be you will get ac.

p.s If you know why,please tell me,thank you.

p.s I'm not live in English-speaking country,so my English is very bad,sorry......

Edited by author 10.11.2007 16:53

It's because of skipping 2. Try sqrt(10) - you won't find 5 in 3..sqrt(10) range. And you won't get 2 either.