[ABC285Ex] Avoid Square Number

数学 · 组合数学 · 容斥原理 · 生成函数

[ABC286A] Range Swap

模拟

[ABC286B] Cat

模拟

[ABC286C] Rotate and Palindrome

模拟 · 枚举

[ABC286D] Money in Hand

动态规划 DP · 背包 DP

[ABC286E] Souvenir

最短路

[ABC286F] Guess The Number 2

数论 · 中国剩余定理 CRT

[ABC286G] Unique Walk

欧拉回路

[ABC286Ex] Don't Swim

计算几何

[ABC287A] Majority

[ABC287B] Postal Card

[ABC287C] Path Graph?

[ABC287D] Match or Not

[ABC287E] Karuta

哈希 hashing · 字典树 Trie

[ABC287F] Components

动态规划 DP · 背包 DP · 树形 DP

[ABC287G] Balance Update Query

线段树 · 二分 · 树状数组 · 分块

[ABC287Ex] Directed Graph and Query

[ABC288A] Many A+B Problems

[ABC288B] Qualification Contest

[ABC288C] Don’t be cycle

[ABC288D] Range Add Query

[ABC288E] Wish List

[ABC288F] Integer Division

字符串 · 动态规划 DP · 前缀和

[ABC288G] 3^N Minesweeper

线性代数 · 快速沃尔什变换 FWT

[ABC288Ex] A Nameless Counting Problem

[ABC289A] flip

[ABC289B] レ

[ABC289C] Coverage

[ABC289D] Step Up Robot

[ABC289E] Swap Places

[ABC289F] Teleporter Takahashi

[ABC289G] Shopping in AtCoder store

[ABC289Ex] Trio

[ABC290A] Contest Result

[ABC290B] Qual B

[ABC290C] Max MEX

[ABC290D] Marking

[ABC290E] Make it Palindrome

[ABC290F] Maximum Diameter

组合数学

[ABC290G] Edge Elimination

[ABC290Ex] Bow Meow Optimization

[ABC291A] camel Case

[ABC291B] Trimmed Mean

[ABC291C] LRUD Instructions 2

[ABC291D] Flip Cards

[ABC291E] Find Permutation

[ABC291F] Teleporter and Closed off

[ABC291G] OR Sum

[ABC291Ex] Balanced Tree

树的重心

[ABC292A] CAPS LOCK