### Exercising Walk

2020

Alice has a cute cat. To keep her cat fit, Alice wants to design an exercising walk for her cat! Initially, Alice’s cat is located […]

### Composite Coloring

2020

A positive integer is called composite if it can be represented as a product of two positive integers, both greater than $1$. For example, the following numbers […]

### K-Complete Word

2020

Word $s$ of length $n$ is called $k$-complete if $s$ is a palindrome, i.e. $s_i=s_{n+1-i}$ for all $1 \le i \le n$; $s$ has a […]

### Walk on Matrix

2020

Bob is playing a game named “Walk on Matrix”. In this game, player is given an $n \times m$ matrix $A=(a_{i,j})$, i.e. the element in […]

### Independent Set

2020

Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph. Given a graph $G=(V,E)$, an independent set is a subset of […]

### Height All the Same

2020

Alice has got addicted to a game called Sirtet recently. In Sirtet, player is given an $n \times m$ grid. Initially $a_{i,j}$ cubes are stacked […]

### Little Artem

2020

Young boy Artem tries to paint a picture, and he asks his mother Medina to help him. Medina is very busy, that’s why she asked […]

### Kind Anton

2020

Once again, Boris needs the help of Anton in creating a task. This time Anton needs to solve the following problem: There are two arrays […]

### Eugene and an array

2020

Eugene likes working with arrays. And today he needs your help in solving one challenging task. An array $c$ is a subarray of an array […]

2020