Hello, community !

I have scrolled some great blogs on Codeforces and some websites(mentioned below) and found some resources. I hope that can help you, me and others.

Books for Competitive Programming

• Competitive Programming, by Steven and Felix Halim. (The first edition is free for download(pdf))

• Programming Challenges: The Programming Contest Training Manual, by Steven Skiena and Miguel Revilla

• Competitive Programmer's Handbook, by Antti Laaksonen. (Free to download(pdf))

• Computational Geometry: Algorithms and Applications, by Mark de Berg, Otfried Cheong, Marc van Kreveld, Mark Overmars

• The Hitchhiker’s Guide to the Programming Contests, by Nite Nimajneb. (This book is free for download (pdf)).

Books for Algorithms

Introduction to Algorithms, by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein

• Algorithm Design, by Jon Kleinberg and Éva Tardos. (The lecture slides of the textbook are available on its official website.)

• The Algorithm Design Manual, by Steven S. Skiena. (You can also find some good resources on its official website.)

• Algorithms, by Robert Sedgewick and Kevin Wayne

• Data Structures and Algorithms in Python. (For pythoner's ;)

Books for Mathematics

• Discrete Mathematics and Its Applications, by Kenneth H. Rosen

• Concrete Mathematics: A Foundation for Computer Science, by Ronald L. Graham, Donald E. Knuth, Oren Patashnik

• Linear Algebra and Its Applications, by David C. Lay, Steven R. Lay, Judi J. McDonald

• Introduction to Probability, by Charles M. Grinstead, J. Laurie Snell. (It's free for download (pdf))

• How to Solve It: A New Aspect of Mathematical Method, by G. Polya

• Intermediate Counting & Probability, by David Patrick

• Computational Geometry: Algorithms and Applications

The sites below are the websites :) where I found the books:-

1. Codeforces Blog.
2. Quora
3. Geeksforgeeks
4. Goodreads
5. Cpbook etc.

You can see also this post.