You are very fortunate to have the opportunity to study COMPUTER SCIENCE. You may already be a fine and growing programmer, but you are choosing to approach this discipline from a different perspective and should expect to revisit some familiar ground as you do. Think of these exercises as opportunities to re-learn and reinforce some of your existing skills as you develop this new perspective. At the CS101 level, you are not supposed to understand how these concepts provide the foundation to build the concepts that will come next. CS may begin with bubble sort and other familiar algorithms, but be careful assuming that it ends there. Wax-on/Wax-off Daniel-san. Computer Science will give you skills and understanding to become a truly elite programmer and much more. While it is possible to attain some, perhaps all, of these skills on your own through hard work as a dedicated programmer, a CS degree is a well trodden path to excellence for those that are willing to embrace the journey to a higher understanding of this art.