Phoenix and Computers

动态规划 DP · 区间 DP · 组合数学 · 生成函数

Phoenix and Earthquake

Phoenix and Odometers

Phoenix and Bits

线段树 · 字典树 Trie · 线段树合并

Phoenix and Diamonds

Tit for Tat

AGAGA XOOORRR

Baby Ehab Partitions Again

Cut

倍增

Baby Ehab Plays with Permutations

Sum of 2050

Morning Jogging

Fillomino 2

Explorer Space

动态规划 DP

Group Photo

Reunion

树形 DP

Starry Night Camping

最小割

Fly Around the World

Red and Blue Beans

The Cake Is a Lie

Berland Regional

Maximum Sum of Products

Off by One

Chests and Keys

动态规划 DP · 二分图

Do Not Be Distracted!

Ordinary Numbers

Not Adjacent Matrix

Same Differences

Arranging The Sheep

Guess the K-th Zero (Hard version)

二分 · 树状数组

Guess the K-th Zero (Easy version)

二分

To Go Or Not To Go?

Nastia and Nearly Good Numbers

Nastia and a Good Array

Nastia and a Hidden Permutation

Nastia Plays with a Tree

动态规划 DP · 贪心 · 树论 · 构造

Nastia and a Beautiful Matrix

二分 · 构造

Game of Life

Lord of the Values

Compression and Expansion

Love-Hate

Crypto Lights

Favorite Game

Try Booking

分治 · 树套树 · K-D Tree

Hopping Around the Array

倍增

Potion-making

Permutation Sort

Robot Collisions

Armchairs

Assimilation IV

期望