The CSES Problem Set is a comprehensive collection of competitive programming problems hosted on the CSES (Code Submission Evaluation System) website, widely used by programmers and students to practice and strengthen their skills in algorithms and data structures. It features around 400 problems organized by topic, covering areas such as sorting, searching, dynamic programming, graph algorithms, mathematics, string algorithms, geometry, and advanced techniques.

It is regularly updated with more questions and has a topic-wise separation of questions as well.

While the CSES book has already been added, the Problem set has not been added. It is very useful and widely used in competitive programming.