Thank you for your reply.

Now I can finally see that someone actually reads my posts.

Would you say you have learned a lot so far?

What would you want to learn in the future?
More special algorithms(like sorting) or more special structures(like the lists mentioned here) or some optimizations(how to make code faster) or something else like special applications(AI, games, others)?

What do you think about the tasks? Did you try to do them(at least in your head)?