ARCTAN - Use of Function Arctan

数学

CLEVER - The Clever Typist

CHAIN - Strange Food Chain

并查集

DELCOMM2 - DEL Command II

BRCKGAME - A Game of Toy Bricks

COVER2 - 3D Cover

SEQ1 - 01 Sequence

CAKE - Birthday Cake

搜索 · 深度优先搜索 DFS · 剪枝

OPTSUB - Optimal Connected Subset

MEMDIS - Memory Distribution

ANALYSER - Program Analyser

LOSTCT - The Secret of a Lost City

BLUEEQ - Help Blue Mary Please! (Act I)

BLUEEQ2 - Help Blue Mary Please! (Act II)

AEROLITE - The Secret of an Aerolite

DRAGON - Greedy Hydra

BARB - Barbarians

ROBOT - Robot Number M

EDIT3 - Editor II

CHRIS - On the Way to Find Chris

CASHIER - Blue Mary Needs Help Again

RAIN2 - Outside it is now raining

SEQ2 - Another Sequence Problem

平衡树

PRLGAME - A Game of Pearls

TOMJERRY - Tom and Jerry

LEMON - Lemon Tree in the Moonlight

WORMS - Play with Digit Seven

PROFIT - Maximum Profit

网络流 · 最小割

PT07A - Play with a Tree

PT07B - The Easiest Problem

PT07C - The GbAaY Kingdom

最短路 · 生成树 · 树的直径

PT07D - Let us count 1 2 3

PT07F - A short vacation in Disneyland

PT07G - Colorful Lights Party

PT07H - Search in XML

PT07J - Query on a tree III

深度优先搜索 DFS · 可持久化线段树

MOLE - Whac-a-Mole

RSORTING - Ranklist Sorting

BLUEEQ3 - Help Blue Mary Please! (Act III)

MKJUMPS - Making Jumps

MOBILE2 - Mobiles

BACKUP - Backup Files

动态规划 DP · 贪心 · 堆 · 凸完全单调性（wqs 二分） · 链表 · 反悔贪心

ZOO - Zoo

枚举 · 深度优先搜索 DFS · 状压 DP

GSS2 - Can you answer these queries II

线段树 · 扫描线

TREEOI14 - Trees

AMATH - Another Mathematical Problem

GIWED - The Great Indian Wedding

AMBM - Ambitious Manager

EXPLOSN - The Explosion

FUSION - Fusion Cube