Permutation Shift

Pairwise Modulo

Common Divisor Graph

XOR and Distance

Stairs

Cherry

Cobb

Mikasa

Diane

You

PizzaForces

Two Tables

Coin Rows

Say No to Palindromes

Boring Segments

线段树 · 排序 · 双指针 two-pointer

Good Graph

A Variety of Operations

Take Your Places!

Compressed Bracket Sequence

动态规划 DP · 动态规划优化 · 单调栈

Take a Guess

Equilibrium

Sports Betting

容斥原理 · 状压 DP

Gates to Another World

DIY Tree

Ezzat and Two Subsequences

Moamen and k-subarrays

Moamen and XOR

数学 · 组合数学 · 位运算

Ezzat and Grid

线段树 · 离散化 · 动态规划优化

Assiut Chess

Charmed by the Game

Up the Strip

Bottom-Tier Reversals

Top-Notch Insertions

线段树 · 二分 · 平衡树 · 组合数学

Down Below

Strange Sort

Mocha and Math

Mocha and Red and Blue

Mocha and Hiking

Mocha and Diana (Hard Version)

Mocha and Diana (Easy Version)

Mocha and Stars

Dislike of Threes

模拟

Who's Opposite?

数学

Infinity Table

Make a Power of Two

Polycarp and String Transformation

Nearest Beautiful Number (hard version)

Nearest Beautiful Number (easy version)

贪心 · 二分 · 枚举 · 深度优先搜索 DFS

Simply Strange Sort

Deep Down Below

贪心