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 201 / 245 1000
Fork and knife 163 / 170 1100
Binomial coefficient 2 124 / 141 1100
Equation 125 / 131 1300
Array rearrangement 116 / 123 1300
Value of subsequences 101 / 109 1400
Inequation 87 / 91 1400
Growing mushrooms 92 / 94 1500
Binary matrix 46 / 61 1600
Broken board 26 / 32 1600
Triangles counting 15 / 36 1800
Restricted path 16 / 18 1900
Heavenly Peach Garden 2 / 3 2000