How to get user api id from regular ID and back in classmates?

Question

Classmates

Is it possible to somehow convert a list of IDs to API IDs and vice versa? It takes a very long time to convert one ID through search.quick :)

Answer 1

For older apps, the ID for the app will be derived from the original ID xor enconding the app's seed.
For new applications, encoding seed = 0, so the ID for the application will not differ from the original ID.

Answer 2

I mean user profile IDs and IDs that come through the application.
The task is this: to make the top 10 Users in the application with links to their profiles. Through the application I get api ID , how can I convert it to a regular one? ok.ru/profile/id