Project Manager

Minimum LCM

Number Reduction

Extremely Round

Notepad#

Hamiltonian Wall

Lucky Chains

最大公约数 gcd

Decomposition

动态规划 DP · 前缀和

MCF

Cut the Triangle

数学

Block Towers

贪心

Count Binary Strings

动态规划 DP

Playoff

贪心

Algebra Flash

状态合并 · 图论建模 · 快速莫比乌斯变换 FMT · 折半搜索 meet in the middle

Two Subtrees

Greatest Convex

Quick Sort

Elemental Decompress

构造

Lucky Permutation

Partial Sorting

数学 · 容斥原理

Wonderful Jump

Узкая дорога

Копирование файлов II

Копирование файлов I

Подкрутка II

动态规划 DP · 贪心

Подкрутка I

Игра в Девятку III

Игра в Девятку II

Игра в Девятку I

Koxia and Whiteboards

Koxia and Permutation

Koxia and Number Theory

Koxia and Game

Koxia and Tree

数学 · 递推 · 期望

Koxia and Sequence

数学

Koxia and Bracket

Koxia, Mahiru and Winter Festival

Hossam and Combinatorics

Hossam and Friends

Hossam and Trainees

Hossam and (sub-)palindromic tree

树形数据结构 · 区间 DP

Hossam and a Letter

动态规划 DP · 枚举 · 双指针 two-pointer

Hossam and Range Minimum Query

线段树 · 二分 · 可持久化线段树 · 哈希 hashing

A+B?

Matrix Rotation

Different Differences

Absolute Sorting

Permutation Game

Copy of a Copy of a Copy

Gaining Rating