How to approach problems like this Playlist or Josephus problem, where we delete some element and rejoin the circle. Also, if anyone can provide 2-3 similar problems, it will be really helpful to master this concept.

Thank you

Can somebody suggest the problems for sliding window technique and two pointers? Codeforces problem set have the tag two pointers but it has random problems, I want 8-9 problems which covers every trick and concept of the topic. Thanks in advance