CategoriesCTF2Math20Misc1OI35solution19template7project1sympy1Tagstree-diameter1tree-centroid1tree3tools2theme1surreal-numbers1sort1sieve1shortest-path1set-theory1sequence6project-euler1probability1prime3prefix-sum2powerful-number1poly1number-theory5math(oi)6math2luogu1linear-algebra1io2interactive1integrate2hash2hack1greedy2graph6geometry3general-term5games3fixed-point4finite-difference2equation2dsu-on-tree1distance2data-structure4constructive2communication1combinatorics2codeforces2brute-force1bitset2bits2binary-search1binary-lifting1Theorem5OGF2Mo-algo2MST1Dynamic-Programming7Calculus7Bugs1Axiom1Ad-hoc3Tag: finite-difference2025-0505-26有限微积分2025-0404-30等差数列的 k 阶前缀和∧