Tahsin and Tree
Tahsin loves graph theory very much. He is especially fond of trees. For his upcoming birthday his f...
Road Minister Techboy
Techboy is appointed as the minister of roads and highway in his country Better-Not-Name-It. Now he ...
Help to Be Happy
A country named Mueawin has one or more villages and one or more people live in every village. Two p...
Preparing for War
There were N cities in England. Each contained a warrior with skillset equal to X. All the cities we...
Kingdom of Code
Kingdom CODE is the most peaceful place in the universe. King NOVOSH and Queen ALMIDA is ruling this...
Change Queries
Today is a very special day for Rubel. Recently he got a job in a software company. Now today is the...
War in the Wizarding World
There is a deadly war going on between two countries (Bitland and Byteland) in the wizarding world. ...
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...
Big Bang Theory
Dr. Sheldon Cooper is working on a project that works on the 2D concept of the universe. In this pro...
MangoSmash
Your friend has come to visit the RUET campus. As the Mango season goes on ⋯, he/she said “Mama Aam ...
T5 Racing
It is high time for the annual T5 racing and your team is planning to win the race. In T5 racing the...
Zoba the Misleader
Zoba has 3 strings, named S1​, S2​ and S3​. He wanted to make a tough problem for Mihaf with these s...
Pretty Diabolical
TRAOMBINNAA is going to be Billy Butcher's base for the next season of the boys. He is going to buil...
Hasan the Treasure Hunter
Benjamin Gates the treasure hunter opened a coaching center named Khajna Dibo Na where he teaches hi...
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
The Spy Cats
After Max and Alexis's initial plan to conquer the world with kitten armies failed, they started a n...
Village Fair 2
There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...
Sayadpur City
Bob wants to visit a new country called sayadpur. There are N cities (1,2,3,…,N) in sayadpur, and th...
COVID-19 Outbreak
COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...
Lets Play Pipeline
In this problem you will have to solve a puzzle game named "Pipeline". 90's kids knows this game ver...
Bad XOR 2 (Hard)
So after successfully becoming many people's nightmare, XOR has struck again, this time to haunt you...
Concatenation of Perfect Squares
You are given a positive integer number. You have to determine whether this number can be represente...
Scary Tree
Recently Alex has been learning about the tree data structure. And, he has been struggling to write ...
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...
Circuit Breaker
In your free time, you like to design various electrical circuits to give a hard time to your local ...
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