An olympiad combinatorics book, by Pranav A. Sriram. The individual chapters are located in posts #1, #11, #49. Olympiad NT through Challenging Problems, by Justin Stevens, is an introductory olympiad number theory text, at a level somewhat easier than what my own number theory handouts assume. Modern Olympiad Number Theory, by Aditya Khurmi. More. The olympiad is organized by the Department of Discrete Mathematics of Moscow Institute of Physics and Technology (National Research University).Here is information about our very strong international master’s program in combinatorics and its applications: Advanced Combinatorics.If you have any questions about this program, please email Prof. Andrei Michailovich.