Circuit Breaker
In your free time, you like to design various electrical circuits to give a hard time to your local ...
XOR Tree
You are given a tree with N vertices. A tree is a connected undirected graph without cycles. The tre...
Memes vs. Social Media
In this era of modern technology social media is the most powerful weapon and the viral issue is the...
Sofdor Ali's Black and White Tree
Sofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...
Wizard Duel
Wizard Duel is approaching soon in Hogwarts and the students of the Dueling Club are absolutely thri...
Haunting of Herobrine
Herobrine's horror stories are known by many, but only a few dares to speak that name out loud, for ...
Explosion
There is a house named Larcana. It is a very weird house. There are exactly N rooms in total and bet...
Best Place to Arrange Contest
We are going to arrange the 7th CPU CSE programming contest in our department. But to arrange a cont...
Darth Vader and 3PO on a Tree!
Did you watch Star Wars yet? No? You should in your free time. Now back to Darth Vader and 3PO. Dart...
Gold Mines
The city of gridland is a grid with n rows and m columns. The city can be divided into n*m cells. A ...
DFS, Graph Moderate 53/68/260
Keep Moving
Balurmath is a city which has N interesting tourist spots, which are connected between themselves by...
Do You Know Tree ?
"Stay at least one metre distance from others.” Corona has affected the World as well as Bangladesh....
Hasinur's Mission!
Let me tell you something about Hasinur: He is a religious person. He prays 5 times a day. He loves...
Traveling Policy of Ajobdesh
In Ajobdesh, there are multiple cities and one of them is considered as the capital city. Obviously,...
Simple And
You are given a tree containing $N$ nodes. The nodes are numbered from $1$ to $N$. The root node of ...
MEXimum
Let’s get straight to the point. You are given a tree. In the tree, each node u has a number au​ ass...
Cheap Tourist
The country of Byteland is divided into N provinces numbered from 1 to N. The provinces are connecte...
Life Saving Algorithm
Recently flood has vastly affected some regions of the country. So many people are helpless and suff...
Tree Queries
You are given a tree of n vertices. Each vertex contains an integer. Vertex 1 is the root of the tre...
Milad's Lost Tree
Milad likes trees so much. He has a rooted tree with $n$ vertices each of which has some non-negativ...
A Boring Game
Alice and Bob are playing a game with a tree with n nodes. Alice always plays first, and the two pla...
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 ...
Plant Trees, Save Life
There are n students in a school. Some of them are friends with each other. You want to make the sch...
Identify the Level
Amin and Belal are two friends. Both have good knowledge about graph and tree in data structure part...
Stephen, Bob, and Tomato's Canvas
If Stephen Hawking was right, then there is a universe where Bob Ross is a student of Tomato Yoshi. ...
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