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 261 / 309 1000
Fork and knife 220 / 227 1100
Binomial coefficient 2 178 / 197 1100
Equation 181 / 187 1300
Array rearrangement 169 / 176 1300
Value of subsequences 151 / 160 1400
Inequation 133 / 138 1400
Growing mushrooms 134 / 136 1500
Binary matrix 70 / 88 1600
Broken board 44 / 55 1600
Triangles counting 32 / 63 1800
Minecraft graph 6 / 8 1800
Restricted path 23 / 28 1900
Heavenly Peach Garden 8 / 11 2000