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 174 / 213 1000
Fork and knife 135 / 140 1100
Binomial coefficient 2 98 / 115 1100
Equation 101 / 109 1300
Array rearrangement 100 / 104 1300
Value of subsequences 84 / 92 1400
Inequation 70 / 73 1400
Growing mushrooms 78 / 80 1500
Binary matrix 36 / 48 1600
Broken board 21 / 25 1600
Triangles counting 14 / 32 1800
Restricted path 16 / 18 1900
Heavenly Peach Garden 1 / 1 2000