Third Month Insanity

Desk Disorder

二分图 · 概率论

Ordering T-Shirts

Circle of Numbers

Arkady and a Nobody-men

Mahmoud and Ehab and the MEX

Mahmoud and Ehab and the bipartiteness

二分图

Mahmoud and Ehab and the xor

Mahmoud and Ehab and the binary string

Mahmoud and Ehab and the function

Mahmoud and Ehab and the final stage

Quasi-palindrome

模拟 · 字符串 · 概率论

Kayaking

1-2-3

Yet Another Array Queries Problem

Turn Off The TV

Almost Permutation

Graphic Settings

Fair Game

模拟 · 排序

Polycarp and Letters

模拟 · 字符串 · 搜索

Bus

Make a Permutation!

Fire

贪心 · 排序 · 背包 DP

Cities Excursions

Save the problem!

Ordering Pizza

Gotta Go Fast

动态规划 DP · 二分 · 期望

Buy Low Sell High

贪心 · 优先队列 · 队列 · 反悔贪心

Hex Dyslexia

Egg Roulette

Flowers and Chocolate

Between the Offices

模拟 · 字符串

Bark to Unlock

模拟 · 字符串 · 枚举

Race Against Time

Qualification Rounds

Huge Strings

Policeman and a Tree

Yet Another Minimization Problem

动态规划 DP · 分治 · 决策单调性

El Toll Caves

The Artful Expedient

模拟 · 搜索 · 枚举

The Eternal Immortality

The Intriguing Obsession

The Overdosing Ubiquity

深度优先搜索 DFS · 虚树

The Untended Antiquity

树状数组 · 进制 · 随机化 · 差分

Search for Pretty Integers

模拟 · 排序 · 剪枝

Maximum of Maximums of Minimums

Maximum splitting

Something with XOR Queries

Points, Lines and Ready-made Titles

Paths

数学 · 数论 · 素数判断,质数,筛法 · 分类讨论 · 欧拉函数