Max Sum Array

Long Comparison

Absent Remainder

Poisoned Dagger

MEX Sequences

Crazy Robot

搜索 · 广度优先搜索 BFS · 深度优先搜索 DFS

Tree Coloring

动态规划 DP · 树形 DP · 组合数学 · 容斥原理

Divan and a Store

Divan and a New Project

Divan and bitwise operations

Divan and Kostomuksha (hard version)

Divan and Kostomuksha (easy version)

Divan and a Cottage

Closing The Gap

And It's Non-Zero

Menorah

X(or)-mas Tree

Purple Crayon

贪心 · 排序 · 树链剖分

LEGOndary Grandmaster

Maximum Adjacent Pairs

Reindeer Games

Integer Diversity

Mirror in the String

Representative Edges

Keep the Average High

数论

Lexicographically Small Enough

Tricolor Triangles

Just Add an Edge

Keep XOR Low

动态规划 DP · 字典树 Trie

Forbidden Subsequence

字符串 · 贪心

GCD Problem

数论 · 最大公约数 gcd

Paprika and Permutation

贪心

Too Many Impostors (hard version)

交互题

Too Many Impostors (easy version)

Christmas Chocolates

Polycarp and Sums of Subsequences

Missing Bigram

Paint the Array

Array and Operations

Singers' Tour

Reverse

Trader Problem

并查集

Square String?

Squares and Cubes

Wrong Addition

模拟

New Year's Problem

二分

MEX and Increments

Let's Play the Hat?

Unusual Minesweeper

Permutation and Queries