Sofdor Ali's Black and White Tree

Sofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...

Bad XOR 2 (Hard)

So after successfully becoming many people's nightmare, XOR has struck again, this time to haunt you...

Milad's Lost Tree

Milad likes trees so much. He has a rooted tree with nnn vertices each of which has some non-negativ...

Scary Tree

Recently Alex has been learning about the tree data structure. And, he has been struggling to write ...

Cheap Tourist

The country of Byteland is divided into N provinces numbered from 1 to N. The provinces are connecte...

Tasks

Zico is a fan of Artificial Intelligence (AI). So he is doing a course on AI and even likes the teac...

Kingdom of Code

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

Village Fair 2

There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...

Hasan the Treasure Hunter

Benjamin Gates the treasure hunter opened a coaching center named Khajna Dibo Na where he teaches hi...

COVID-19 Outbreak

COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...

Haunting of Herobrine

Herobrine's horror stories are known by many, but only a few dares to speak that name out loud, for ...

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...

Set the Meeting

Three colleagues Motu, Biscuit and Ramjan are in Sundarbans now. They are on a mission to protect th...

Scarlet Speedster

The scarlet speedster of Central City, popularly known as the Flash is fighting an epic battle again...

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...

Keep Moving

Balurmath is a city which has N interesting tourist spots, which are connected between themselves by...

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. ...

Circuit Breaker

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

Identify the Level

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

Traveling Policy of Ajobdesh

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

War in the Wizarding World

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

Unfair Robot Race

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

Taofiq the House Prefect

Tomorrow is a very special day for Taofiq. He is participating in an intra school quiz contest. As h...

Shortest Path?

Given an unweighted, undirected and connected graph consists of NNN nodes numbered from 111 to NNN. ...

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...

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