Have you taken an algorithms course? Working through Skiena's Algorithm Design Manual [0] would be a good start and/or watching his lecture series on Youtube [

Have you taken an algorithms course? Working through Skiena's Algorithm Design Manual [0] would be a good start and/or watching his lecture series on Youtube [1]. Other great books include Elements of Programming Interviews [2] which comes in Java, C++, and Python flavors. It can help to focus on a smaller subset of Leetcode problems to learn the tricks that underlie most of them. Neetcode [3] is a good collection of those problems on which you could focus your time and efforts. I don't think it's realistic to expect to do well on Leetcode without practicing the above skills to some degree, so I wouldn't be hard on yourself if it's been years since you even looked at the material. [0] https://www.amazon.com/Algorithm-Design-Manual-Computer-Science-dp-3030542580/dp/3030542580 https://www.amazon.com/Algorithm-Design-Manual-Computer-Scie... [1] https://www.youtube.com/watch?v=dphSwq5jP1A&list=PLOtl7M3yp-DXbHTFe_w9zFPXeau28CDao https://www.youtube.com/watch?v=dphSwq5jP1A&list=PLOtl7M3yp-... [2] https://elementsofprogramminginterviews.com/ https://elementsofprogramminginterviews.com/ [3] https://neetcode.io/ https://neetcode.io/