[ABC111D] Robot Arms

[ARC103E] Tr/ee

构造

[ARC103F] Distance Sums

[ARC104A] Plus Minus

数学

[ARC104B] DNA Sequence

前缀和

[ARC104C] Fair Elevator

动态规划 DP

[ARC104D] Multiset Mean

背包 DP · 前缀和

[ARC104E] Random LIS

动态规划 DP · 枚举 · 容斥原理

[ARC104F] Visibility Sequence

区间 DP

[ARC105A] Fourtune Cookies

[ARC105B] MAX-=min

[ARC105C] Camels and Bridge

[ARC105D] Let's Play Nim

[ARC105E] Keep Graph Disconnected

[ARC105F] Lights Out on Connected Graph

集合幂级数，子集卷积 · 状压 DP

[ARC106A] 106

[ARC106B] Values

[ARC106C] Solutions

[ARC106D] Powers

数学 · 组合数学 · 二项式定理

[ARC106E] Medals

二分 · 图论建模 · 状压 DP · Hall 定理

[ARC106F] Figures

组合数学 · 排列组合 · 生成函数 · Prüfer 序列

[ARC107A] Simple Math

[ARC107B] Quadruple

[ARC107C] Shuffle Permutation

[ARC107D] Number of Multisets

动态规划 DP

[ARC107E] Mex Mat

[ARC107F] Sum of Abs

网络流 · 图论建模 · 最小割

[ARC108A] Sum and Product

[ARC108B] Abbreviate Fox

[ARC108C] Keep Graph Connected

[ARC108D] AB

动态规划 DP · Fibonacci 数列 · 分类讨论

[ARC108E] Random IS

树状数组 · 区间 DP · 期望

[ARC108F] Paint Tree

[ARC109A] Hands

[ARC109B] log

[ARC109C] Large RPS Tournament

[ARC109D] く

[ARC109E] 1D Reversi Builder

[ARC109F] 1D Kingdom Builder

[ARC110A] Redundant Redundancy

[ARC110B] Many 110

[ARC110C] Exoswap

[ARC110D] Binomial Coefficient is Fun

组合数学 · 生成函数

[ARC110E] Shorten ABC

动态规划 DP · 构造 · Ad-hoc

[ARC110F] Esoswap

[ARC111A] Simple Math 2

数论

[ARC111B] Reversible Cards

图论建模 · 生成树

[ARC111C] Too Heavy

贪心 · 排序 · 置换

[ARC111D] Orientation

强连通分量 · 构造 · Ad-hoc

[ARC111E] Simple Math 3