[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

数学 · 逆元 · 随机化 · 构造

[ARC129D] -1+2-1

数学 · Ad-hoc

[ARC129E] Yet Another Minimization

网络流 · 最小割

[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

[ARC131E] Christmas Wreath

[ARC131F] ARC Stamp

[ARC132A] Permutation Grid

[ARC132B] Shift and Reverse

[ARC132C] Almost Sorted

动态规划 DP · 状态合并

[ARC132D] Between Two Binary Strings

[ARC132E] Paw

[ARC132F] Takahashi The Strongest

容斥原理 · 快速沃尔什变换 FWT

[ARC133A] Erase by Value

[ARC133B] Dividing Subsequence

[ARC133C] Row Column Sums

[ARC133D] Range XOR

[ARC133E] Cyclic Medians

[ARC133F] Random Transition

组合数学 · 生成函数

[ARC134A] Bridge and Sheets

[ARC134B] Reserve or Reverse

[ARC134C] The Majority

[ARC134D] Concatenate Subsequences

[ARC134E] Modulo Nim

[ARC134F] Flipping Coins

[ARC135A] Floor, Ceil - Decomposition

[ARC135B] Sum of Three Terms

[ARC135C] XOR to All

[ARC135D] Add to Square

其它技巧 · 构造

[ARC135E] Sequence of Multiples

[ARC135F] Delete 1, 4, 7, ...

[ARC136A] A ↔ BB

[ARC136B] Triple Shift

[ARC136C] Circular Addition

[ARC136D] Without Carry

动态规划 DP · 前缀和