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AtCoder Solutions 1A collection of original AtCoder writeups from March to June 2024, covering ABC 340 F, 341 D, 346 D/E/F, and 356 D/E/F.
19 min read English -
Codeforces Solutions 3A collection of original Codeforces writeups from January to September 2024, focused on number theory, games, combinatorics, and EDU problems.
53 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 -
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