Hi, I am a second year comp sci student. Recently I have been struggling very much in Data Struct and Algos and also for Theoretical CS 2. Is there anywhere I can look to better my understanding of these two topics. I am looking for anything at this point, where I can go to learn and apply the concepts. I felt in school it went by very fast and I didnt get what I was supposed to out of it. Any help would be great thanks.