Field Division (easy version)

单调栈

Yasya and the Mysterious Tree

字典树 Trie

Turtle and Piggy Are Playing a Game

数学

Turtle and an Infinite Sequence

位运算

Turtle and an Incomplete Sequence

贪心 · 最近公共祖先 LCA

Turtle and Multiplication

欧拉回路

Turtle and Intersected Segments

生成树

Turtle and Paths on a Tree

树形 DP

Soccer

Collatz Conjecture

数论

Boring Day

双指针 two-pointer

Beauty of the mountains

数论 · 前缀和

Number of k-good subarrays

分治

Sorting Problem Again

线段树 · 二分

Array Divisibility

Corner Twist

Have Your Cake and Eat It Too

Swap Dilemma

I Love Balls

array-value

二分 · 字典树 Trie

Your Loss

倍增 · 树形 DP

Strange Splitting

构造

Large Addition

数学

Magnitude (Hard Version)

动态规划 DP · 贪心

Magnitude (Easy Version)

动态规划 DP · 贪心

"a" String Problem

数论 · 哈希 hashing

Shuffle

树形 DP

Reconstruction

动态规划 DP · 枚举

Magic Trick II

构造

Tower Capturing

动态规划 DP

Creating Words

模拟 · 字符串

Maximum Multiple Sum

模拟 · 数学

Good Prefixes

模拟

Manhattan Circle

模拟 · 贪心

Secret Box

数学 · 枚举 · 排列组合

Final Boss

二分

D-Function

数学

Maximize the Largest Component (Hard Version)

深度优先搜索 DFS · 差分

Maximize the Largest Component (Easy Version)

深度优先搜索 DFS

X Axis

排序

Matrix Stabilization

模拟

Update Queries

贪心

Mathematical Problem

动态规划 DP · 贪心

Beautiful Array

数论

Non-academic Problem

双连通分量

Permutation Problem (Hard Version)

数论

Permutation Problem (Simple Version)

数论

Upload More RAM

数学

K-Sort

贪心

Basil's Garden

递推