The LCMs Must be Large

Vicky's Delivery Service

Telephone Number

Lost Numbers

枚举

News Distribution

Bicolored RBS

Range Deleting

Scalar Queries

数学 · 线段树 · 树状数组

Low Budget Inception

Increasing by Modulo

Good Triple

And Reachability

Anagram Paths

Xor Permutations

Circle Metro

Pairs

Nauuo and Cards

Nauuo and Circle

Nauuo and Pictures (hard version)

Nauuo and Pictures (easy version)

Nauuo and Portals

Nauuo and ODT

Nauuo and Bug

Nauuo and Votes

Nauuo and Chess

Ehab Fails to Be Thanos

Ehab Is an Odd Person

Ehab and a Special Coloring Problem

Ehab and the Expected XOR Problem

Ehab and the Expected GCD Problem

动态规划 DP · 数学

Ehab and the Big Finale

树链剖分

From Hero to Zero

Catch Overflow!

模拟 · 递归

Electrification

数学 · 二分

Array Splitting

Minimal Segment Cover

倍增

The Number of Subpermutations

Yet Another Partiton Problem

线段树 · cdq 分治 · 动态规划优化 · 斜率优化 · 可持久化 · 凸包 · 李超线段树 · 线段树合并

Divide it!

Merge it!

Lose it!

Recover it!

Cover it!

贪心 · 深度优先搜索 DFS · 生成树

Destroy it!

Digits Sequence (Easy Edition)

Digits Sequence (Hard Edition)

Prime Minister

WOW Factor

Tiles

Prime Graph