Hello Codeforces, I am currently planning on improving my graph theory and data structure knowledge over the next month so I am looking for some resources available for them. For graph theory I know a lot of resources namely youtube playlists of some channels like William Fiset. I would like to learn some of your favourite resources for Data Structures (SegTrees,BITs etc.) and Graph Theory Algorithms. I do have an abundance of problemsets for both topics so I only need a good, comprehensive tutorial for them like some books or a long playlist or sth. I appreciate all responses so please do not hesitate to share your personal favorites.