Bad XOR 2 (Hard)
So after successfully becoming many people's nightmare, XOR has struck again, this time to haunt you...
Concatenation of Perfect Squares
You are given a positive integer number. You have to determine whether this number can be represente...
Scary Tree
Recently Alex has been learning about the tree data structure. And, he has been struggling to write ...
Kingdom - Great Roads of Destiny
Shin wants to be the “Great General of the Heaven”. It is his dream. But becoming a “Great General o...
Tasks
Zico is a fan of Artificial Intelligence (AI). So he is doing a course on AI and even likes the teac...
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...
Shortest Path?
Given an unweighted, undirected and connected graph consists of $N$ nodes numbered from $1$ to $N$. ...
Sofdor Ali's Black and White Tree
Sofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...
Memes vs. Social Media
In this era of modern technology social media is the most powerful weapon and the viral issue is the...
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
Scarlet Speedster
The scarlet speedster of Central City, popularly known as the Flash is fighting an epic battle again...
Keep Moving
Balurmath is a city which has N interesting tourist spots, which are connected between themselves by...
Traveling Policy of Ajobdesh
In Ajobdesh, there are multiple cities and one of them is considered as the capital city. Obviously,...
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...
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...
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