Complex, difficult and complicated

Fast and Easy Data Compressor

Searching for Nessy

My T-shirt suits me

Numbers and operations

The Scrooge Co Problem

Automatic Correction of Misspellings

Basic wall maze

Construct the wall maze

Dihedral groups

贪心

Economic phone calls

Flavius Josephus Reloaded

Gergovia的酒交易 Wine trading in Gergovia

贪心 · 前缀和

Homogeneous squares

Formula 1

Exact Sum

Encoding

最大乘积 Maximum Product

搜索 · 枚举 · 前缀和

Beverages

Playing War

Andy's Second Dictionary

B2-Sequence

Number Theory

数论 · 最大公约数 gcd

A Gentlemen's Agreement

Aragorn

Little Red Riding Hood

An Easy Task

A Graph Problem

The Good Old Times

Permutation Representation

Points

Euler's Totient Function

Draw Grid

Collage

Add Again

数学

Find the Permutations

Open Credit System

枚举 · 优先队列

What's the Time?

Place the Guards

连通块 · 二分图

Strings

矩阵解压 Matrix Decompressing

网络流 · 二分图

Zeroes Revisited

Anagram Division

Back to the 8-Queens

Composite Prime

Divisibility Testing

End up with More Teams

状压 DP

Fi-binary Number

Going in Cycle!!

二分 · 负权环 · 分数规划

How many Knight Placing?