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 200 / 244 1000
Fork and knife 162 / 169 1100
Binomial coefficient 2 122 / 139 1100
Equation 121 / 127 1300
Array rearrangement 114 / 120 1300
Value of subsequences 99 / 107 1400
Inequation 85 / 88 1400
Growing mushrooms 89 / 91 1500
Binary matrix 45 / 61 1600
Broken board 26 / 32 1600
Triangles counting 15 / 36 1800
Restricted path 16 / 18 1900
Heavenly Peach Garden 2 / 3 2000