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 115 / 144 1000
Fork and knife 93 / 96 1100
Binomial coefficient 2 63 / 73 1100
Equation 64 / 69 1300
Array rearrangement 62 / 65 1300
Value of subsequences 56 / 61 1400
Inequation 44 / 44 1400
Growing mushrooms 51 / 52 1500
Binary matrix 26 / 32 1600
Broken board 12 / 14 1600
Triangles counting 10 / 25 1800
Restricted path 14 / 15 2000