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 229 / 277 1000
Fork and knife 186 / 193 1100
Binomial coefficient 2 149 / 168 1100
Equation 150 / 156 1300
Array rearrangement 142 / 147 1300
Value of subsequences 122 / 131 1400
Inequation 106 / 108 1400
Growing mushrooms 112 / 114 1500
Binary matrix 58 / 74 1600
Broken board 34 / 43 1600
Triangles counting 27 / 54 1800
Minecraft graph 4 / 4 1800
Restricted path 20 / 25 1900
Heavenly Peach Garden 6 / 9 2000