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When Problem-Setting Syndrome Strikes, Start with the Strange CoreBased on the original "Problem-Setting Syndrome Struck" notes, preserving the "Magic Bag" problem, derivation, code, and extension directions.
5 min read English -
Java ConcurrencyCovers JMM, locks, atomic classes, ThreadLocal, thread pools, and more.
71 min read English -
MySQL (I): Page Structure, Indexes, and B+ TreesNotes covering fundamentals, indexes, B+ trees, and execution plans.
25 min read English -
Java Abstract Boundaries: Collections, IO, Reflection, Proxy, and SPIBased on original Java notes, preserving the original organization of Collections, IO, Reflection, Proxy, and SPI.
49 min read English -
Why Polynomial Algorithms Matter in Competitive ProgrammingFrom convolution, point-value representation, FFT/NTT to formal power series - understanding what this polynomial toolkit is really solving.
11 min read English -
My Intro to Generating Functions: Let Coefficients Be AnswersBuilt from the original notes, restoring ordinary generating functions, exponential generating functions, modeling intuition, and several typical problems.
13 min read English -
From Convolution to Inversion: What Mobius Inversion DoesBased on original number theory notes, covering Dirichlet convolution, Möbius function, inversion techniques, and common identities.
4 min read English -
A Framework for Judging Game Theory in ContestsBased on original game theory notes, supplementing the judgment framework, Bash/Nim, Misere games, Fibonacci game, Wythoff's game, and SG function.
11 min read English
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