Wizard Duel Wizard Duel is approaching soon in Hogwarts and the students of the Dueling Club are absolutely thri... |
Best Place to Arrange Contest We are going to arrange the 7th CPU CSE programming contest in our department. But to arrange a cont... |
MEXimum Let’s get straight to the point. You are given a tree. In the tree, each node u has a number au ass... |
MangoSmash Your friend has come to visit the RUET campus. As the Mango season goes on ⋯, he/she said “Mama Aam ... |
Cheap Tourist The country of Byteland is divided into N provinces numbered from 1 to N. The provinces are connecte... |
Pretty Diabolical TRAOMBINNAA is going to be Billy Butcher's base for the next season of the boys. He is going to buil... |
Change Queries Today is a very special day for Rubel. Recently he got a job in a software company. Now today is the... |
XOR Tree You are given a tree with N vertices. A tree is a connected undirected graph without cycles. The tre... |
Sayadpur City Bob wants to visit a new country called sayadpur. There are N cities (1,2,3,…,N) in sayadpur, and th... |
Simple And You are given a tree containing $N$ nodes. The nodes are numbered from $1$ to $N$. The root node of ... |
Flow Finder Last summer, Carla the Cartographer went on an expedition on behalf of the National Center for Posit... |
Help to Be Happy A country named Mueawin has one or more villages and one or more people live in every village. Two p... |
Lets Play Pipeline In this problem you will have to solve a puzzle game named "Pipeline". 90's kids knows this game ver... |
Do You Know Tree ? "Stay at least one metre distance from others.” Corona has affected the World as well as Bangladesh.... |
Hide and Seek You know how to play hide-and-seek, right? In a group of kids, one of them is selected to be the see... |
Hasinur's Mission! Let me tell you something about Hasinur: He is a religious person. He prays 5 times a day. He loves... |
COVID-19 Outbreak COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country... |
Identify the Level Amin and Belal are two friends. Both have good knowledge about graph and tree in data structure part... |
Scary Tree Recently Alex has been learning about the tree data structure. And, he has been struggling to write ... |
Yet Another XOR Problem Given a rooted tree with N nodes where each node has a value, find a pair of nodes (u, v) so that u ... |
The Spy Cats After Max and Alexis's initial plan to conquer the world with kitten armies failed, they started a n... |
Circuit Breaker In your free time, you like to design various electrical circuits to give a hard time to your local ... |
Life Saving Algorithm Recently flood has vastly affected some regions of the country. So many people are helpless and suff... |
Hasan the Treasure Hunter Benjamin Gates the treasure hunter opened a coaching center named Khajna Dibo Na where he teaches hi... |
Kingdom of Code Kingdom CODE is the most peaceful place in the universe. King NOVOSH and Queen ALMIDA is ruling this... |