Space Isaac

字符串 · 枚举 · 位运算

Hyperspace Highways

Interstellar battle

数学 · 连通块 · 期望

Ancient civilizations

计算几何 · 构造

Shady Lady

AI robots

线段树 · cdq 分治 · 树套树

Self-exploration

组合数学 · 排列组合

Palindrome Pairs

字符串 · 枚举 · 进制

Moonwalk challenge

Space Formula

Splitting money

Say Hello

Little C Loves 3 I

构造

Cover Points

Vasya And Password

Relatively Prime Pairs

Vasya and Multisets

Bicolorings

动态规划 DP · 状态合并 · 连通块

Vasya and Big Integers

动态规划 DP · 二分 · 哈希 hashing · Z 函数

The Shortest Statement

最短路 · 生成树 · 最近公共祖先 LCA

Distinctification

并查集 · 线段树合并 · 启发式合并

Euler tour

Elevator or Stairs?

Appending Mex

Candies Distribution

Changing Array

贪心 · 前缀和 · 位运算

Chips Puzzle

Electric Scheme

New Road Network

Epic Convolution

Metro

Alice and Hairdresser

Lucky Days

Refactoring

Segments on the Line

Tree and XOR

贪心 · 二分 · 字典树 Trie

Jellyfish Nightmare

Determine Line

Divide Candies

Pick Heroes

Decorate Apple Tree

Check Transcription

字符串 · 哈希 hashing

Write The Contest

Take Metro

Detect Robots

根号分治

Bmail Computer Network

DDoS

Tanya and Colored Candies

Cashier

Forgery

枚举 · 广度优先搜索 BFS