From this year's contest rules
Quote:
7. Books and written materials are allowed. Any machine-readable materials (like other pro-
grams which you have written) are not allowed. However, you are allowed to use ?stan-
dard? libraries for your programming languages; for example, the STL for C++, java.util.*,
java.io.*, etc. for Java, and so on.
and
Quote:
8. Applications other than editors, compilers, debuggers or other standard programming tools
are not allowed. Any use of other applications will lead to disqualification.
So no, you're not allowed to use that (or any) website, since that requires a use of a browser. I think there's a "loophole" for when the same documentation can be accessed through your IDE (JavaDocs and such), but then it must be a "standard" feature.