Zhily and Permutation

Zhily and Colorful Strings

Zhily and Array Operating

贪心

Zhily and Mex and Max

贪心

A Number Between Two Others

数学

Alternating String

字符串

Red-Black Pairs

动态规划 DP

Exceptional Segments

位运算

Covering Points with Circles

数学 · 计算几何 · 构造

String Cutting

字符串 · 贪心 · 二分 · 枚举 · 哈希 hashing · 后缀数组 SA

Simple Problem

数学 · 图论 · 数论 · 深度优先搜索 DFS · 图遍历 · 最大公约数 gcd · 构造

Disturbing Distribution

Everything Everywhere

Mental Monumental (Easy Version)

Reserved Reversals

Mental Monumental (Hard Version)

Inversion Invasion

Stop Spot

Koshary

Party Monster

Snowfall

数学 · 构造

Palindromex

It All Went Sideways

It Just Keeps Going Sideways

Drowning

Fallen Leaves