App - System

Completely Stuck in this challenge. Any hints on where to concentrate ??

Try the easier challenges first to figure out if you’re experienced enough to achieve this one.

I would do that. But small hint would be nice. Is it overflow in abs() ??

I am not asking for solution.. only guidance ???

Yes, it would be nice.
I am also stuck in there.

I could do some tricks (like setting the base I want desite controls or creating floating exceptions ...), I aloso have a clear view of the stack in function process, but I miss some points.