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 182 / 225 1000
Fork and knife 143 / 149 1100
Binomial coefficient 2 108 / 124 1100
Equation 108 / 115 1300
Array rearrangement 107 / 111 1300
Value of subsequences 90 / 98 1400
Inequation 77 / 80 1400
Growing mushrooms 83 / 85 1500
Binary matrix 41 / 55 1600
Broken board 24 / 29 1600
Triangles counting 15 / 35 1800
Restricted path 16 / 18 1900
Heavenly Peach Garden 1 / 2 2000