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 202 / 246 1000
Fork and knife 165 / 171 1100
Binomial coefficient 2 127 / 144 1100
Equation 128 / 134 1300
Array rearrangement 120 / 127 1300
Value of subsequences 103 / 111 1400
Inequation 91 / 94 1400
Growing mushrooms 95 / 97 1500
Binary matrix 48 / 63 1600
Broken board 26 / 34 1600
Triangles counting 20 / 42 1800
Restricted path 17 / 20 1900
Heavenly Peach Garden 3 / 6 2000