Explosion
There is a house named Larcana. It is a very weird house. There are exactly N rooms in total and bet...
Itsy's Magic Cards
Itsy needs your help with her magic cards. Her magic cards grant her special spider-witch powers. Un...
How Many Ways?
Regular problem solvers starts their journey by solving ad hoc and number theory. After getting the ...
Wakanda Forever
We all know that Thanos has erased half of the population of the universe. Earth’s population was al...
MangoSmash
Your friend has come to visit the RUET campus. As the Mango season goes on ⋯\cdots⋯, he/she said “Ma...
Marbles Per Second
You have a rooted tree of nnn nodes. If we traverse the tree from the root, let’s say the traversing...
Milad's Lost Tree
Milad likes trees so much. He has a rooted tree with nnn vertices each of which has some non-negativ...
A Boring Game
Alice and Bob are playing a game with a tree with n nodes. Alice always plays first, and the two pla...
Ghosh vs Datta
About two hundred years ago, a serious dispute evoked between the two neighboring colonies of Khulna...
Road Minister Techboy
Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ...
Reverse The Magic
You are probably familiar with the technique of representing a Tree as an array of integers using Eu...
War in the Wizarding World
There is a deadly war going on between two countries (Bitland and Byteland) in the wizarding world. ...
Flyover in Twinland
Rio has become the president of Twinland. Now he wants to develop his country to fulfill his promise...
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 48/62/247
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...
Christmas Tree
Professor Rio has an amazing Christmas tree. Unlike other trees, this Christmas tree has some specia...
Prime Avoider
Mr. X is a friend of Hafiz bhai. Mr. X loves to play with numbers in his leisure but he hates prime ...
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...
Big Bang Theory
Dr. Sheldon Cooper is working on a project that works on the 2D concept of the universe. In this pro...
Sofdor Ali's Black and White Tree
Sofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...
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...
The Spy Cats
After Max and Alexis's initial plan to conquer the world with kitten armies failed, they started a n...
Meena Meets The Marauders
December 14, 1975 Hogwarts School of Witchcraft and Wizardry It’s been a long long day. The Marauder...
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 ...
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