I'm not sure I necessarily agree with this strategy. In my CS undergrad, I had an algorithms class where the professor did this and expected the students to be able to do homework assignments each week that were worth a significant portion of our grade with basically no explanation on how to solve these extremely complicated optimization problems. When comparing our assignments to that of another student taking the same class with a different professor, theirs were much, much easier.

I dont think this teaching methodology made me gain any more from the course, if anything, it made me gain less because I constantly had the stress of trying to do these ridiculous problems on top of all of my other work every week