Add and Divide

Replace and Keep Sorted

Floor and Mod

数学 · 整除分块

Multiples and Power Differences

构造

Move and Swap

动态规划 DP · 贪心 · 树论

Copy or Prefix Sum

动态规划 DP · 哈希表 · STL

Shifting Stacks

Eastern Exhibition

Guessing the Greatest (hard version)

二分

Guessing the Greatest (easy version)

二分

Max Median

二分 · 前缀和

Paired Payment

图论 · 最短路

Pairs of Paths

最近公共祖先 LCA · 树论 · 差分

Arena

Cat Cycle

Minimum Ties

Pythagorean Triples

Cheap Dinner

Ones

数位 DP

String Counting

动态规划 DP · 容斥原理

Dense Array

Balanced Remainders

Sum of Cubes

枚举

Permutation Transformation

Accidental Victory

Equalize the Array

Old Floppy Drive

K-th Largest Value

Minimal Cost

Pekora and Trampoline

Zookeeper and The Infinite Zoo

Fib-tree

分治 · 深度优先搜索 DFS · 树论

Magnets

二分 · 构造

Switch and Flip

构造

Yuezheng Ling and Dynamic Tree

最近公共祖先 LCA · 分块

Ruler Of The Zoo

Three swimmers

Card Deck

Maximum width

Genius's Gambit

Almost Fault-Tolerant Database

Anti-knapsack

Planet Lapituletti

模拟

K-beautiful Strings

GCD of an Array

Enormous XOR

Enchanted Matrix

ABC String

Berland Crossword

1D Sokoban