Sasha and a Bit of Relax

Sasha and One More Name

Sasha and a Patient Friend

Sasha and Interesting Fact from Graph Theory

Sasha and a Very Easy Test

Sasha and Algorithm of Silence's Sounds

动态树 LCT · 整体二分

Parity

Tape

Meaningless Operations

Jongmah

Magic Stones

Nearest Leaf

Tree-Tac-Toe

Modest Substrings

动态规划 DP · AC 自动机 · KMP 算法 · 后缀数组 SA

Superhero Transformation

Average Superhero Gang Power

Creative Snap

二分 · 递归 · 剪枝

Destroy the Colony

Tree

Sasha and His Trip

Sasha and Magnetic Machines

Got Any Grapes?

Yet Another Array Partitioning Task

Trailing Loves (or L'oeufs?)

Flood Fill

Arithmetic Progression

Please, another Queries on Array?

线段树 · 数论

Best Subsegment

Emotes

Magic Ship

Magic Gems

动态规划 DP · 矩阵加速

Decypher the String

Crisp String

Recursive Queries

Water Buying

Tanya and Candies

Palindromic Matrix

Coffee and Coursework (Hard Version)

Coffee and Coursework (Easy version)

Yet Another Ball Problem

Tree Cutting (Hard Version)

Tree Cutting (Easy Version)

Ilya and a Colorful Walk

Alyona and a Narrow Fridge

Ramesses and Corner Inversion

Frets On Fire

Pavel and Triangles

Niyaz and Small Degrees

Get Ready for the Battle

Triple

数学 · 快速沃尔什变换 FWT