CategoriesLinux1Math5Misc1OI11project1sympy1Tagstheme1template2surreal-numbers1sort1solution4sieve1sequence1project-euler1probability1prefix-sum2powerful-number1poly1number-theory2math3luogu1io1interactive1hack1geometry1games1fixed-point1finite-difference2ds1constructive1combinatorics1codeforces2bits1OGF2Firefox1Ad-hoc1Tag: solution2025-0505-21十二重计数法05-20CF2109C (Div. 2) Hacking Numbers05-19PE484 Arithmetic Derivative05-19CF2101B (Div. 1) Quartet Swapping∧