I highly recommend Introduction to algorithms. Cormen, T. H., Leiserson, C. E., Rivest, R. L., & Stein, C. (2009). Introduction to algorithms. MIT press.

please follow the following links:

https://stackoverflow.com/questions/11032015/how-to-find-time-complexity-of-an-algorithm

https://www.studytonight.com/data-structures/time-complexity-of-algorithms

CORE MAN IS THE BEST BOOK FOR THIS

Thank you Mr. @Om Prakash Yadav

and @Satya Prakash Yadav

I highly recommend Introduction to algorithms. Cormen, T. H., Leiserson, C. E., Rivest, R. L., & Stein, C. (2009). Introduction to algorithms. MIT press.

Thank you very much @Raed Alazaidah

Aurhor :Coreman

book name: Algorithms

@Satya Prakash Yadav

Thank you very much