Module Introduction to combinatorics

Introduction to combinatorics

**Frequency: 7/10** Combinatorics problems are quite common in Competitive Programming.

Resources

Tài liệu Tiếng Anh: - [CP Algorithms: Binomial Coefficients](https://cp-algorithms.com/combinatorics/binomial-coefficients.html) - [CP Algorithms: Stars and bars](https://cp-algorithms.com/combinatorics/stars_and_bars.html)

Problems

Binomial coefficient 80 / 104 1000
Fork and knife 67 / 70 1100
Binomial coefficient 2 43 / 52 1100
Equation 44 / 47 1300
Array rearrangement 45 / 47 1300
Value of subsequences 40 / 44 1400
Inequation 29 / 29 1400
Growing mushrooms 37 / 37 1500
Binary matrix 18 / 26 1600
Broken board 7 / 8 1600
Triangles counting 6 / 18 1800
Restricted path 10 / 11 2000