Array Partition

线段树 · 二分 · 树状数组 · 离散化 · 分块 · ST 表 · 单调栈

Strange Functions

Jumps

数学 · 构造

Ping-pong

Sequence and Swaps

动态规划 DP · 贪心 · 排序

Four Points

String and Operations

动态规划 DP

Forbidden Value

XOR-ranges

Row GCD

Glass Half Spilled

Latin Square

数学

Flip and Reverse

贪心 · 欧拉回路

Nim Shortcuts

Range Diameter Sum

树形数据结构 · 并查集 · 分治 · 最近公共祖先 LCA · 树论 · ST 表 · 扫描线

Red-Blue Shuffle

Move and Turn

String Generation

Find the Spruce

Random Events

Divide and Summarize

Water Level

Mathematical Expression

Favorite Sequence

Last Year's Substring

字符串

Unique Number

贪心

Add to Neighbour and Remove

Close Tuples (hard version)

Close Tuples (easy version)

The Treasure of The Segments

Dungeon

Find The Array

Busy Robot

Pairs

Plan of Lectures

Max Correct Set

动态规划 DP · 状压 DP

My Beautiful Madness

Bovine Dilemma

Last minute enhancements

Canine poetry

13th Labour of Heracles

Apollo versus Pan

Euclid's nightmare

Song of the Sirens

Finding satisfactory solutions

The Riddle of the Sphinx

Wizard of Orz

Hills And Valleys

贪心

Three Bags

Sum of Paths

动态规划 DP