Be Like Hasib

Answer the Queries

An Obvious Interactive Problem

Most Difficult Problem Ever

Complex Operations

Lucky Shirt

Sofdor Ali and Attack Optimization

The Multiplayer Action Game

Spot It!

Balanced Relief

Buildings

Mind Flayer Has Attacked Again!

I Scream, You Scream!

Poltu and Interesting Number

XOR Partition

M-Sequence

Jenga Tower

Watercolor

City of Burgerland

Beauty Factor

Straightforward

Dividing the Gifts

The Exceptional Artist

Average the Array

A New Tree