Build a Contest

NN and the Optical Illusion

Dasha and Chess

Andrew and Taxi

二分 · 拓扑排序

Ivan and Burgers

线性基 · 离线处理 · 二区间合并（猫树分治）

Minimum Integer

Accordion

Division and Union

GCD Counting

动态规划 DP · 点分治 · 树形 DP · 最大公约数 gcd

Polycarp's New Job

Trucks and Cities

(Zero XOR Subset)-less

线性代数 · 线性基

Integer Sequence Dividing

Array K-Coloring

Doors Breaking and Repairing

Balanced Ternary String

Monotonic Renumeration

Elongated Matrix

Grid game

Game with modulo

Johnny Solving

Professional layer

Radix sum

Splitting into digits

Game with string

Salem and Sticks

Zuhair and Strings

Ayoub and Lost Array

动态规划 DP

Kilani and the Game

Helping Hiasat

Lunar New Year and Cross Counting

Lunar New Year and Food Ordering

Lunar New Year and Number Division

Lunar New Year and a Wander

堆

Lunar New Year and Red Envelopes

Lunar New Year and a Recursive Sequence

数学 · 原根 · 矩阵加速 · 大步小步算法 BSGS

Digits Sequence Dividing

Digital root

Brutality

Compression

Vasya and Binary String

区间 DP

Vasya and Endless Credits

动态规划 DP · 网络流

Vasya and Maximum Profit

Two distinct points

Divisors of Two Integers

Nice Garland

Diverse Garland

Array and Segments (Hard version)

Array and Segments (Easy version)

MST Unification