Orac and Models

Sum of Round Numbers

Same Parity Summands

K-th Not Divisible by n

Alice, Bob and Candies

Special Elements

Binary String Reconstruction

Special Permutation

构造

Most Unstable Array

Two Arrays And Swaps

Board Moves

Constructing the Array

K-periodic Garland

Decreasing Heights

Alarm Clock

Ternary String

Not So Simple Polygon Embedding

Simple Polygon Embedding

Multiset

Graph Coloring

背包 DP · 二分图

Summoning Minions

Find a Gift

随机化

Sequence with Digits

Young Explorers

Count Triangles

Game With Array

Restorer Distance

Guess Divisors Count

Berland Poker

New Theatre Square

Mixing Water

Yet Another Yet Another Task

Modular Stability

RC Kaboom Show

Minimal Square

Honest Coach

Similar Pairs

Buying Shovels

数学 · 数论 · 枚举

Polygon

模拟 · 深度优先搜索 DFS

Spy-string

A/B Matrix

Binary Median

Johnny and Contribution

模拟 · 图论 · 贪心 · 拓扑排序 · 构造

Johnny and Grandmaster

Johnny and Megan's Necklace

Johnny and James

贪心

James and the Chase

图论 · 随机化

Johnny and New Toy

随机化

Johnny and Ancient Computer

Johnny and His Hobbies