Plant Trees, Save LifeThere are n students in a school. Some of them are friends with each other. You want to make the sch...

Traveling Policy of AjobdeshIn Ajobdesh, there are multiple cities and one of them is considered as the capital city. Obviously,...

Identify The LevelAmin and Belal are two friends. Both have good knowledge about graph and tree in data structure part...

COVID19 OutbreakCOVID19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...

Sofdor Ali's Black and White TreeSofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...

Kingdom of CodeKingdom CODE is the most peaceful place in the universe. King NOVOSH and Queen ALMIDA is ruling this...

Circuit BreakerIn your free time, you like to design various electrical circuits to give a hard time to your local ...

Road Minister TechboyTechboy is appointed as the minister of roads and highway in his country BetterNotNameIt. Now he ... 
Scarlet SpeedsterThe scarlet speedster of Central City, popularly known as the Flash is fighting an epic battle again...

Yet Another XOR ProblemGiven a rooted tree with N nodes where each node has a value, find a pair of nodes (u, v) so that u ...

Scary TreeRecently Alex has been learning about “Tree” data structure. While he was learning, a question popp...

Kingdom  Great Roads of DestinyShin wants to be the “Great General of the Heaven”. It is his dream. But becoming a “Great General o...

Bad XOR 2 (Hard)So after successfully becoming many people’s nightmare, XOR has struck again, this time to haunt you...

Prime AvoiderMr. X is a friend of Hafiz bhai. Mr. X loves to play with numbers in his leisure but he hates prime ...

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. Dar... 
Keep MovingBalurmath is a city which has N interesting tourist spots, which are connected between themselves by... 
Village Fair 2There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...

War in the Wizarding WorldThere is a deadly war going on between two countries (Bitland and Byteland) in the wizarding world. ...

A Boring GameAlice and Bob are playing a game with a tree with n nodes. Alice always plays first, and the two pla... 
Gold MinesThe city of gridland is a grid with n rows and m columns. The city can be divided into n*m cells. A ...

Haunting of HerobrineHerobrine’s horror stories are known by many, but only a few dares to speak that name out loud, for ...

Big Bang TheoryDr. Sheldon Cooper is working on a project that works on the 2D concept of the universe. In this pro...

The Spy CatsAfter Max and Alexis’s initial plan to conquer the world with kitten armies failed, they started a n...

Life Saving AlgorithmRecently flood has vastly affected some regions of the country. So many people are helpless and suff...

ExplosionThere is a house named Larcana. It is a very weird house .There are exactly N rooms in total and bet...

T5 RacingIt is high time for the annual T5 racing and your team is planning to win the race. In T5 racing the...

Zoba the MisleaderZoba has 3 strings, named S1, S2 and S3. He wanted to make a tough problem for Mihaf with these stri...

Stephen, Bob, and Tomato's CanvasIf Stephen Hawking was right, then there is a universe where Bob Ross is a student of Tomato Yoshi. ...

Unfair Robot RaceTwo teams of robots, Team A and Team B, are racing in a 2D grid. There will be a total of 6 rounds. ...

MonoMonoYou have probably heard of the famous board game, Monopoly. According to Wikipedia, in this game, pl...

Preparing for WarThere were N cities in England. Each contained a warrior with skillset equal to X. All the cities we...

Milad's Lost TreeMilad likes trees so much. He has a rooted tree with $n$ vertices each of which has some nonnegativ...
