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 319 / 370 1000
Fork and knife 274 / 280 1100
Binomial coefficient 2 223 / 248 1100
Equation 232 / 239 1300
Array rearrangement 218 / 227 1300
Value of subsequences 189 / 198 1400
Inequation 179 / 183 1400
Growing mushrooms 174 / 176 1500
Binary matrix 91 / 109 1600
Broken board 54 / 65 1600
Triangles counting 44 / 79 1800
Minecraft graph 16 / 19 1800
Restricted path 30 / 35 1900
Heavenly Peach Garden 11 / 15 2000