[ARC123C] 1, 2, 3 - Decomposition

动态规划 DP · 记忆化搜索 · 数位 DP

[ARC123D] Inc, Dec - Decomposition

三分 · 斜率维护技巧 slope trick

[ARC123E] Training

[ARC123F] Insert Addition

[ARC124A] LR Constraints

[ARC124B] XOR Matching 2

[ARC124C] LCM of GCDs

数论 · 枚举 · 最大公约数 gcd

[ARC124D] Yet Another Sorting Problem

贪心 · 并查集 · 图论建模 · Ad-hoc

[ARC124E] Pass to Next

动态规划 DP

[ARC124F] Chance Meeting

组合数学 · 容斥原理 · Catalan 数 · 快速傅里叶变换 FFT · 快速数论变换 NTT

[ARC125A] Dial Up

[ARC125B] Squares

[ARC125C] LIS to Original Sequence

[ARC125D] Unique Subsequence

[ARC125E] Snack

[ARC125F] Tree Degree Subset Sum

[ARC126A] Make 10

[ARC126B] Cross-free Matching

[ARC126C] Maximize GCD

[ARC126D] Pure Straight

[ARC126E] Infinite Operations

[ARC126F] Affine Sort

[ARC127A] Leading 1s

[ARC127B] Ternary Strings

[ARC127C] Binary Strings

[ARC127D] Sum of Min of Xor

[ARC127E] Priority Queue

[ARC127F] ±AB

[ARC128A] Gold and Silver

[ARC128B] Balls of Three Colors

[ARC128C] Max Dot

[ARC128D] Neq Neq

[ARC128E] K Different Values

[ARC128F] Game against Robot

[ARC129A] Smaller XOR

[ARC129B] Range Point Distance

[ARC129C] Multiple of 7

[ARC129D] -1+2-1

[ARC129E] Yet Another Minimization

[ARC129F] Let's Play Tag

[ARC130A] Remove One Character

[ARC130B] Colorful Lines

[ARC130C] Digit Sum Minimization

贪心 · 枚举 · 分类讨论

[ARC130D] Zigzag Tree

[ARC130E] Increasing Minimum

[ARC130F] Replace by Average

[ARC131A] Two Lucky Numbers

[ARC131B] Grid Repainting 4

[ARC131C] Zero XOR

[ARC131D] AtArcher