[ABC450A] 3,2,1,GO

[ABC450B] Split Ticketing

模拟

[ABC450C] Puddles

搜索 · 图论 · 广度优先搜索 BFS · 深度优先搜索 DFS · 连通块

[ABC450D] Minimize Range

贪心 · 排序

[ABC450E] Fibonacci String

递归 · 前缀和 · Fibonacci 数列

[ABC450F] Strongly Connected 2

动态规划 DP · 图论 · 线段树

[ABC450G] Random Subtraction

期望

[ABC451A] illegal

[ABC451B] Personnel Change

[ABC451C] Understory

堆 · 优先队列 · STL

[ABC451D] Concat Power of 2

搜索 · 数学 · 排序 · 广度优先搜索 BFS · 深度优先搜索 DFS

[ABC451E] Tree Distance

生成树 · 最近公共祖先 LCA

[ABC451F] Make Bipartite 3

并查集 · 启发式合并

[ABC451G] Minimum XOR Walk

图论 · 贪心 · 深度优先搜索 DFS · 线性基 · 字典树 Trie

[ABC452A] Gothec

模拟

[ABC452B] Draw Frame

模拟 · 字符串

[ABC452C] Fishbones

模拟 · 字符串

[ABC452D] No-Subsequence Substring

字符串 · 二分 · 线性 DP

[ABC452E] You WILL Like Sigma Problem

数学 · 前缀和

[ABC452F] Interval Inversion Count

树状数组 · 双指针 two-pointer

[ABC452G] 221 Substring

后缀自动机 SAM · 后缀数组 SA · 双指针 two-pointer

[ABC453A] Trimo

[ABC453B] Sensor Data Logging

模拟

[ABC453C] Sneaking Glances

搜索 · 深度优先搜索 DFS

[ABC453D] Go Straight

广度优先搜索 BFS

[ABC453E] Team Division

排列组合 · 逆元 · 差分

[ABC453F] Avoid Division

构造 · Ad-hoc

[ABC453G] Copy Query

可持久化线段树

[ABC454A] Closed interval

[ABC454B] Mapping

模拟

[ABC454C] Straw Millionaire

广度优先搜索 BFS · 深度优先搜索 DFS · 图论建模

[ABC454D] (xx)

字符串 · 贪心 · 栈

[ABC454E] LRUD Moving

二分图 · 构造

[ABC454F] Make it Palindrome 2

贪心 · 差分

[ABC454G] Mode in the Subtree

树上启发式合并

Repeat ACL

Integer Preference

Connect Cities

Flat Subsequence

Replace Digits

Heights and Pairs

Reachable Towns

Sum is Multiple

Moving Pieces

Keep Distances

Shuffle Window

Center Rearranging

[AGC001A] BBQ Easy

贪心 · 排序

[AGC001B] Mysterious Light

递归

[AGC001C] Shorten Diameter

枚举 · 树的直径