[ABC279F] BOX

[ABC279G] At Most 2 Colors

线性 DP

[ABC279Ex] Sum of Prod of Min

[ABC280A] Pawn on a Grid

[ABC280B] Inverse Prefix Sum

[ABC280C] Extra Character

[ABC280D] Factorial and Multiple

[ABC280E] Critical Hit

[ABC280F] Pay or Receive

图论 · 图论建模 · 最短路

[ABC280G] Do Use Hexagon Grid 2

容斥原理

[ABC280Ex] Substring Sort

[ABC281A] Count Down

[ABC281B] Sandwich Number

[ABC281C] Circular Playlist

[ABC281D] Max Multiple

动态规划 DP · 数论

[ABC281E] Least Elements

[ABC281F] Xor Minimization

贪心 · 字典树 Trie · 位运算

[ABC281G] Farthest City

动态规划 DP · 组合数学 · 排列组合

[ABC281Ex] Alchemy

[ABC282A] Generalized ABC

模拟

[ABC282B] Let's Get a Perfect Score

模拟

[ABC282C] String Delimiter

模拟 · 字符串

[ABC282D] Make Bipartite 2

图遍历 · 二分图

[ABC282E] Choose Two and Eat One

生成树

[ABC282F] Union of Two Sets

倍增 · ST 表 · 构造

[ABC282G] Similar Permutation

动态规划 DP · 前缀和

[ABC282Ex] Min + Sum

二分 · 分治

[ABC283A] Power

模拟

[ABC283B] First Query Problem

模拟

[ABC283C] Cash Register

模拟

[ABC283D] Scope

模拟 · 栈

[ABC283E] Don‘t Isolate Elements

动态规划 DP

[ABC283F] Permutation Distance

线段树 · 树状数组 · 分类讨论

[ABC283G] Partial Xor Enumeration

线性基

[ABC283Ex] Popcount Sum

[ABC284A] Sequence of Strings

模拟

[ABC284B] Multi Test Cases

模拟

[ABC284C] Count Connected Components

图遍历

[ABC284D] Happy New Year 2023

数论 · 枚举 · 素数判断

[ABC284E] Count Simple Paths

模拟 · 图遍历

[ABC284F] ABCBAC

哈希 hashing · KMP 算法

[ABC284G] Only Once

组合数学 · 基环树

[ABC284Ex] Count Unlabeled Graphs

数学 · 群论

[ABC285A] Edge Checker 2

模拟

[ABC285B] Longest Uncommon Prefix

模拟

[ABC285C] abc285_brutmhyhiizp

模拟

[ABC285D] Change Usernames

模拟

[ABC285E] Work or Rest

动态规划 DP

[ABC285F] Substring of Sorted String

线段树 · 树状数组

[ABC285G] Tatami

网络流 · 二分图