String Deletion

String Reversal

Realistic Gameplay

Yet Another DAG Problem

Boring Apartments

Yet Another Bookshelf

Dominant Piranha

Districts Connection

Two Round Dances

Zero Remainder Sum

Reducing Delivery Cost

A Convex Game

Reorder

Prime Square

Binary Search

Bandit in a City

Complicated Computations

莫队 · 线段树

Sum Over Subsets

数学 · 莫比乌斯反演 · 组合数学

Marketing Scheme

Reverse Binary Strings

Chef Monocarp

动态规划 DP

Minimal Height Tree

Make It Increasing

Emotional Fishermen

动态规划 DP · 组合数学

Death DBMS

Specific Tastes of Andre

Valerii Against Everyone

Engineer Artem

Powerful Ksenia

Yurii Can Do Everything

Olha and Igor

最近公共祖先 LCA · 随机化 · Ad-hoc

Binary Table (Hard Version)

Binary Table (Easy Version)

Graph Subset Problem

Greedy Shopping

线段树 · 二分

INOI Final Contests

Cheat and Win

Buy the String

Sum of Medians

Extreme Subtraction

Identify the Operations

Graph Transpositions

Sum

分治 · 背包 DP

Black, White and Grey Tree

Differentiating Games

Kids Seating

Saving the City

The Delivery Dilemma

Long Permutation

Division