Combinatorics #0.1: 计数中常用的结论
常见计数结论、Lucas 定理、不定方程解计数、平面分拆、DAG 路径计数、多项式平移、XOR 均匀性与若干竞赛常用结论。
Counting
Index
All notes
Combinatorics #1.2: Inclusion-Exclusion, Bounded Diophantine Equations, and Derangements
Inclusion-exclusion in set and operator form, equal-count subproblems, bounded Diophantine counting, derangements, Stirling numbers, and selected contest problems.