Shortest Path?
Given an unweighted, undirected and connected graph consists of $N$ nodes numbered from $1$ to $N$. ...
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
The Spy Cats
After Max and Alexis's initial plan to conquer the world with kitten armies failed, they started a n...
Set the Meeting
Three colleagues Motu, Biscuit and Ramjan are in Sundarbans now. They are on a mission to protect th...
Hasan the Treasure Hunter
Benjamin Gates the treasure hunter opened a coaching center named Khajna Dibo Na where he teaches hi...
Scarlet Speedster
The scarlet speedster of Central City, popularly known as the Flash is fighting an epic battle again...
Tasks
Zico is a fan of Artificial Intelligence (AI). So he is doing a course on AI and even likes the teac...
Best Place to Arrange Contest
We are going to arrange the 7th CPU CSE programming contest in our department. But to arrange a cont...
Tree Queries
You are given a tree of n vertices. Each vertex contains an integer. Vertex 1 is the root of the tre...
Zoba the Misleader
Zoba has 3 strings, named S1​, S2​ and S3​. He wanted to make a tough problem for Mihaf with these s...
Bad XOR 2 (Hard)
So after successfully becoming many people's nightmare, XOR has struck again, this time to haunt you...
Preparing for War
There were N cities in England. Each contained a warrior with skillset equal to X. All the cities we...
Road Minister Techboy
Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ...
Scary Tree
Recently Alex has been learning about the tree data structure. And, he has been struggling to write ...
Kingdom of Code
Kingdom CODE is the most peaceful place in the universe. King NOVOSH and Queen ALMIDA is ruling this...
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
Haunting of Herobrine
Herobrine's horror stories are known by many, but only a few dares to speak that name out loud, for ...
Lets Play Pipeline
In this problem you will have to solve a puzzle game named "Pipeline". 90's kids knows this game ver...
Village Fair 2
There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...
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...
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...
Explosion
There is a house named Larcana. It is a very weird house. There are exactly N rooms in total and bet...
MonoMono
You have probably heard of the famous board game, Monopoly. According to Wikipedia, in this game, pl...
Birthday Present?!
As everyone gifts graphs or strings to people on their birthdays, Oyshee’s friends decided to do som...
Big Bang Theory
Dr. Sheldon Cooper is working on a project that works on the 2D concept of the universe. In this pro...
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