[ARC140A] Right String

[ARC140B] Shorten ARC

[ARC140C] ABS Permutation (LIS ver.)

[ARC140D] One to One

[ARC140E] Not Equal Rectangle

[ARC140F] ABS Permutation (Count ver.)

容斥原理 · 生成函数 · 快速傅里叶变换 FFT · Ad-hoc

[ARC141A] Periodic Number

[ARC141B] Increasing Prefix XOR

[ARC141C] Bracket and Permutation

[ARC141D] Non-divisible Set

[ARC141E] Sliding Edge on Torus

[ARC141F] Well-defined Abbreviation

[ARC142A] Reverse and Minimize

[ARC142B] Unbalanced Squares

[ARC142C] Tree Queries

[ARC142D] Deterministic Placing

树形 DP

[ARC142E] Pairing Wizards

[ARC142F] Paired Wizards

[ARC143A] Three Integers

[ARC143B] Counting Grids

[ARC143C] Piles of Pebbles

[ARC143D] Bridges

[ARC143E] Reversi

[ARC143F] Counting Subsets

[ARC144A] Digit Sum of 2x

[ARC144B] Gift Tax

[ARC144C] K Derangement

[ARC144D] AND OR Equation

[ARC144E] GCD of Path Weights

图论 · 数论 · 树形 DP

[ARC144F] Arithmetic Sequence Nim

博弈论 · 其它技巧 · 分类讨论 · SG 函数

[ARC145A] AB Palindrome

[ARC145B] AB Game

[ARC145C] Split and Maximize

组合数学 · Catalan 数

[ARC145D] Non Arithmetic Progression Set

进制 · 构造

[ARC145E] Adjacent XOR

[ARC145F] Modulo Sum of Increasing Sequences

[ARC146A] Three Cards

[ARC146B] Plus and AND

[ARC146C] Even XOR

[ARC146D] >=<

[ARC146E] Simple Speed

动态规划 DP

[ARC146F] Simple Solitaire

[ARC147A] Max Mod Min

[ARC147B] Swap to Sort

[ARC147C] Min Diff Sum

[ARC147D] Sets Scores

数学 · 组合数学

[ARC147E] Examination

[ARC147F] Again ABC String

[ARC148A] mod M

[ARC148B] dp