Growing Trees

Is it stated?

They Have Fooled

Are You a Procrastinator?

Sweep Line

Grid

Mathematician Takeover

Palindrome

Help, what does it mean to be "Based"

Accuracy-Preserving Summation Algorithm

Painting the Ribbon

数学

Make It Ugly

数学

Long Multiplication

贪心

Colored Balls

动态规划 DP

Chain Reaction

贪心

Unique Strings

群论 · 容斥原理

Yogurt Sale

模拟

Progressive Square

模拟

Inhabitant of the Deep Sea

模拟

Inaccurate Subsequence Search

双指针 two-pointer

Long Inversions

线段树

Unfair Game

动态规划 DP · 数学

GCD on a grid

动态规划 DP · 搜索 · 数论 · 最大公约数 gcd

The Most Reckless Defense

动态规划 DP · 状态合并

Nene's Game

贪心

Nene and the Card Game

贪心

Nene's Magical Matrix

数学 · 贪心

Nene and the Mex Operator

动态规划 DP · 构造

Nene vs. Monsters (Hard Version)

数学

Nene vs. Monsters (Easy Version)

数学

Nene and the Passing Game

图论 · 并查集

Stickogon

数学

A BIT of a Construction

贪心 · 位运算

How Does the Rook Move?

动态规划 DP · 组合数学 · 排列组合

A BIT of an Inequality

前缀和 · 位运算

Carousel of Combinations

数论 · 组合数学

Frequency Mismatch (Hard Version)

线段树 · 哈希 hashing

Frequency Mismatch (Easy Version)

线段树 · 哈希 hashing

Everything Nim

贪心 · 博弈论

Missing Subsequence Sum

贪心 · 构造

Folding Strip

Missing Subarray Sum

Connected Cubes

Conference

Card Exchange

贪心

Rectangle Filling

模拟 · 贪心

Permutation Counting

Reverse Card (Hard Version)

Reverse Card (Easy Version)

Fenwick Tree

动态规划 DP · 组合数学