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Notes on Problem DesignBuilt around the original 'Problem-Setting Syndrome' notes, this post keeps the Magic Bag problem, its derivation, code, and follow-up directions.
16 min read English -
Why Learn PolynomialsFrom convolution and point-value representation to FFT/NTT and formal power series, this post explains what the polynomial toolkit is really solving.
13 min read English -
Mobius Inversion NotesBased on the original number theory notes, this post restores Dirichlet convolution, the Mobius function, inversion techniques, and common identities.
9 min read English -
Generating Functions PrimerBuilt from the original notes, this post restores ordinary and exponential generating functions, modeling intuition, and several representative problems.
12 min read English -
Competitive Game Theory NotesBased on the original game theory notes, this post restores the decision framework, Bash/Nim, misere play, Fibonacci game, Wythoff game, and the SG function.
13 min read English -
Search, DFS, BFS, and DPBuilt from the original search problem sets and solution notes, this post organizes DFS, BFS, pruning, shortest paths, and state-space search.
28 min read English -
Linear Sieve NotesBased on the original number theory notes, this post keeps the material on prime sieves, Euler's totient function, and Wilson's theorem.
10 min read English -
Number Theory BasicsBased on the original number theory notes, this post keeps gcd, lcm, Bezout's identity, extended Euclid, fast exponentiation, inverses, and CRT.
9 min read English