How Many Ways?
Regular problem solvers starts their journey by solving ad hoc and number theory. After getting the ...
Itsy's Magic Cards
Itsy needs your help with her magic cards. Her magic cards grant her special spider-witch powers. Un...
Meena Meets The Marauders
December 14, 1975 Hogwarts School of Witchcraft and Wizardry It’s been a long long day. The Marauder...
I Hate Long Description
There are N cities in the country AjobDesh and M one way roads connecting the cities. There lives ex...
Traveling Policy of Ajobdesh
In Ajobdesh, there are multiple cities and one of them is considered as the capital city. Obviously,...
A Boring Game
Alice and Bob are playing a game with a tree with n nodes. Alice always plays first, and the two pla...
Keep Moving
Balurmath is a city which has N interesting tourist spots, which are connected between themselves by...
Hidden Graph
There is an unweighted, undirected hidden graph. You are given an integer range from L to R. There a...
Directed Rectangle
Sami has just finished his assignments, to relax, he wants to play games. Since he’s banned from PUB...
Sofdor Ali's Black and White Tree
Sofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...
Spanning Tree
There are N nodes in a tree. You can start from any node of that tree and you have to come back to t...
Graph Moderate 80/86/125
Counting Friends
Johnny uses a social network called Supernova. Unlike the other social networks, Supernova does not ...
Act of Random Kindness (Hard)
Sammy and Meera liked adventures a lot. Once in a while they used to set out adventures. This time t...
Road Minister Techboy
Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ...
A Game of Bots
You were idly scrolling through your Phesbook feed one morning when you discovered an ongoing event ...
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
Wakanda Forever
We all know that Thanos has erased half of the population of the universe. Earth’s population was al...
Reverse The Magic
You are probably familiar with the technique of representing a Tree as an array of integers using Eu...
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...
Milad's Lost Tree
Milad likes trees so much. He has a rooted tree with $n$ vertices each of which has some non-negativ...
Christmas Tree
Professor Rio has an amazing Christmas tree. Unlike other trees, this Christmas tree has some specia...
Scary Tree
Recently Alex has been learning about the tree data structure. And, he has been struggling to write ...
Poltu and Graph
Poltu has got a graph with N nodes and M edges. Every edge has a weight. There can be multiple edges...
City of Atlantis
Have you ever heard of The Atlantis City? It’s a Greek mythological city. Its existence doesn’t matt...
Memes vs. Social Media
In this era of modern technology social media is the most powerful weapon and the viral issue is the...
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