Haunting of Herobrine
Herobrine's horror stories are known by many, but only a few dares to speak that name out loud, for ...
Road Minister Techboy
Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ...
Sofdor Ali's Black and White Tree
Sofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...
Village Fair 2
There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...
Big Bang Theory
Dr. Sheldon Cooper is working on a project that works on the 2D concept of the universe. In this pro...
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 ...
Scary Tree
Recently Alex has been learning about the tree data structure. And, he has been struggling to write ...
Identify the Level
Amin and Belal are two friends. Both have good knowledge about graph and tree in data structure part...
COVID-19 Outbreak
COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...
Hasinur's Mission!
Let me tell you something about Hasinur: He is a religious person. He prays 5 times a day. He loves...
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...
Do You Know Tree ?
"Stay at least one metre distance from others.” Corona has affected the World as well as Bangladesh....
Lets Play Pipeline
In this problem you will have to solve a puzzle game named "Pipeline". 90's kids knows this game ver...
Help to Be Happy
A country named Mueawin has one or more villages and one or more people live in every village. Two p...
Flow Finder
Last summer, Carla the Cartographer went on an expedition on behalf of the National Center for Posit...
DFS, Flow Moderate 8/12/88
Simple And
You are given a tree containing $N$ nodes. The nodes are numbered from $1$ to $N$. The root node of ...
Sayadpur City
Bob wants to visit a new country called sayadpur. There are N cities (1,2,3,…,N) in sayadpur, and th...
XOR Tree
You are given a tree with N vertices. A tree is a connected undirected graph without cycles. The tre...
Change Queries
Today is a very special day for Rubel. Recently he got a job in a software company. Now today is the...
Pretty Diabolical
TRAOMBINNAA is going to be Billy Butcher's base for the next season of the boys. He is going to buil...
Cheap Tourist
The country of Byteland is divided into N provinces numbered from 1 to N. The provinces are connecte...
MangoSmash
Your friend has come to visit the RUET campus. As the Mango season goes on ⋯, he/she said “Mama Aam ...
MEXimum
Let’s get straight to the point. You are given a tree. In the tree, each node u has a number au​ ass...
Best Place to Arrange Contest
We are going to arrange the 7th CPU CSE programming contest in our department. But to arrange a cont...
Wizard Duel
Wizard Duel is approaching soon in Hogwarts and the students of the Dueling Club are absolutely thri...
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