The heart flu

$ 10 to Win?

Financial Management

Code Number

Cancer or Scorpio

Reading a Quadtree

Calculating IRR

Neverland

Area

Arithmetic

Battleships

Binary Calculator

Binomial Theorem

Brainfuck

模拟 · 进制

Checkers

Coming Home

Dice

Divisor Game

DNA

DNA II

Emigration

Equation

Extra Spaces

Galactic Bonding

Hic-Hac-Hoe

In The Airport

LAMApbo

Lucky Numbers

多边形 Polygon

Round Trip

Sierpinski Carpet

Switch The Lights

Tele-loto

Time Deposit

Story of Tomisu Ghost

Fukushima Nuclear Blast

Hamming Base

Mad Scientist

Corrupted Friendship

名次表的变化 Fantasy Cricket

Weird Advertisement

线段树 · 扫描线

A Change in Thermal Unit

Prime Independence

Save from Radiation

Almost Union-Find

并查集 · 平衡树 · 哈希 hashing · 启发式合并

破损的键盘 Broken Keyboard (a.k.a. Beiju Text)

Cake Cutting

``Dynamic'' Inversion

树状数组 · cdq 分治 · 树套树 · 可持久化线段树 · 分块 · 整体二分

Easy Problem from Rujia Liu?

Fast Matrix Operations

线段树 · 构造