Submarine in the Rybinsk Sea (hard edition)

Submarine in the Rybinsk Sea (easy edition)

OpenStreetMap

Geometers Anonymous Club

Three Piles of Candies

Odd Sum Segments

模拟 · 贪心

Robot Breakout

RGB Substring (hard version)

RGB Substring (easy version)

Connected Component on a Chessboard

K-th Path

DIY Wooden Ladder

Pillars

Array Splitting

Yet Another Subarray Problem

Culture Code

图论 · 线段树 · 最短路

Coloring Game

动态规划 DP · 博弈论 · SG 函数

MP3

Welfare State

Matching vs Independent Set

构造 · Ad-hoc

Rectangle Painting 1

记忆化搜索 · 区间 DP

Rectangle Painting 2

网络流 · 二分图

GCD Groups 2

动态规划 DP · 状态合并 · 随机化

City Day

Water Lily

Hotelier

Block Adventure

Round Corridor

White Lines

Compress Words

哈希 hashing · KMP 算法

Graph Traveler

Important Exam

Zero Array

Maximum Median

贪心 · 二分

Treasure Hunting

Knightmare (hard)

Knightmare (easy)

You Are Given Two Binary Strings...

You Are Given a Decimal String...

You Are Given a WASD-string...

Print a 1337-string...

数学 · 构造

You Are Given Some Strings...

字符串 · 动态规划 DP · 哈希 hashing · AC 自动机 · 根号分治

You Are Given Some Letters...

Circle of Students

Equal Rectangles

Common Divisors

Remove the Substring (hard version)

Remove the Substring (easy version)

Boxers

Complete the Projects (hard version)