Fault-tolerant Network

Nearest Excluded Points

Sum of Matchings

Tower Defense

线段树 · 可持久化线段树 · 分块

Maximum Cake Tastiness

Prefix Removals

Alice and the Cake

Potion Brewing Class

Arithmetic Operations

Minimal String Xoration

动态规划 DP · 倍增 · 哈希 hashing · 后缀数组 SA

Snowy Mountain

Three Minimums

Good Pairs

Subtract Operation

Make Equal With Mod

K-good

Equal Tree Sums

贪心 · 构造

Parametric MST

Cycle Palindrome

Equal LCM Subsets

线段树 · 构造

Neighbour Ordering

Integer Moves

XY Sequence

Bracket Sequence Deletion

For Gamers. By Gamers.

动态规划 DP · 二分 · 排序

Star MST

组合数学

Words on Tree

Marin and Photoshoot

Marin and Anti-coprime Permutation

Shinju and the Lost Permutation

388535 (Hard Version)

388535 (Easy Version)

Gojou and Matrix Game

Juju and Binary String

Red Versus Blue

贪心

Bit Flipping

贪心 · 位运算

Line Empire

贪心

Reverse Sort Sum

树状数组

AND-MEX Walk

图论 · 并查集 · 位运算

Tree and Permutation Game

Vasya and Coins

Vlad and Candies

Get an Even String

Maximum Product Strikes Back

Matrix and Shifts

Promising String (hard version)

Promising String (easy version)

Array Balancing

Getting Zero

Water the Trees