[ABC223D] Restricted Permutation

拓扑排序

[ABC223E] Placing Rectangles

[ABC223F] Parenthesis Checking

[ABC223G] Vertex Deletion

[ABC223H] Xor Query

[ABC224A] Tires

[ABC224B] Mongeness

[ABC224C] Triangle?

[ABC224D] 8 Puzzle on Graph

广度优先搜索 BFS

[ABC224E] Integers on Grid

[ABC224F] Problem where +s Separate Digits

[ABC224G] Roll or Increment

[ABC224H] Security Camera 2

[ABC225A] Distinct Strings

[ABC225B] Star or Not

[ABC225C] Calendar Validator

[ABC225D] Play Train

[ABC225E] フ

[ABC225F] String Cards

动态规划 DP

[ABC225G] X

[ABC225H] Social Distance 2

[ABC226A] Round decimals

[ABC226B] Counting Arrays

[ABC226C] Martial artist

[ABC226D] Teleportation

[ABC226E] Just one

[ABC226F] Score of Permutations

[ABC226G] The baggage

[ABC226H] Random Kth Max

动态规划 DP · 容斥原理 · 期望 · 定积分

[ABC227A] Last Card

[ABC227B] KEYENCE building

[ABC227C] ABC conjecture

[ABC227D] Project Planning

贪心 · 二分

[ABC227E] Swap

[ABC227F] Treasure Hunting

[ABC227G] Divisors of Binomial Coefficient

数学

[ABC227H] Eat Them All

[ABC228A] On and Off

[ABC228B] Takahashi's Secret

[ABC228C] Final Day

[ABC228D] Linear Probing

[ABC228E] Integer Sequence Fair

[ABC228F] Stamp Game

单调队列 · 前缀和

[ABC228G] Digits on Grid

[ABC228H] Histogram

动态规划 DP · 斜率优化

[ABC229A] First Grid

[ABC229B] Hard Calculation

[ABC229C] Cheese

[ABC229D] Longest X

[ABC229E] Graph Destruction