Farewell Gift for Messi
Lionel Messi, the greatest footballer of all time, is going to retire from international football! O...
Alligator Sky
There are N balls in a box. You have two robots Alice and Bob. You will set favorite number for each...
Shortest Path, Yet Again?
Mr O is teaching Algorithms 101 to his students. The class just finished learning BFS and now he wan...
Strong Passwords
Mitu had been using the password mitu1997qt on all her online accounts. And sure enough, her account...
Greedy Grid Game
“Uban game world” is an indoor gaming zone. It offers 5 game segments for only one ticket. Today, Al...
Clock Fantasy
One day the author imagined an analog clock with minute and hour arms. The thought was simple: if we...
Make More Money
You, the great businessman of TEUB, arrived at ESC land which consists of N cities numbered from 1 t...
Match Sticks
Bob was playing with match sticks and discovered that he could create alphabets and numbers by arran...
Final Over
This is ICC World Cup Final and the match is between Bangladesh and Australia. The match goes down t...
Cheers !!
Isabella is from the 19 series of RUET. She loves programming. Also, She considers a number lucky fo...
President of RUET FC
Zenitsu has been elected as the president of RUET FC and now he wants to sign some of the best world...
Shuvo Noboborsho!
"Shuvo Noboborsho" is the traditional greeting for Bengalis in the Bengali new year which means "Hap...
Locality-Sensitive Hashing I
According to Wikipedia, Locality-Sensitive hashing (LSH) is an algorithmic technique that hashes sim...
Jealous Nobita
Shizuka and Dekisugi are playing with a binary tree rooted at 1. In each turn, the player chooses a ...
Robi Kaka's Cube
Our beloved Robi Kaka has invented a cube. You have to solve only one side of this cube – a square o...
Compressed String
You are given a string $S$ consisting of lowercase latin letters '$a$' & '$b$' only. Your task is to...
Think Inside the Box
Babu Bhai is a student of AUST. He has some favorite numbers. His favorite numbers are those number ...
Ice-Cream of Montu Mia Again!
Montu Mia is a student of “Omok School”. He likes to eat an ice-cream every day. But he also likes t...
Chance of Passing the Quiz
Rocky is starting his online quizzes and he has been provided with some passing criteria. The rule o...
Who Gets the Money!?
Who doesn’t get happy after getting money in the pockets of clothes before washing them? During this...
Hououin Kyouma!
Okabe Rintarou, the mad scientist is doing research to find the most desired Steins Gate. Besides be...
ACT 1: Ash Counting Trees
Ash Ketchum has a weird rooted tree (read Notes sections if you don't know about tree data structure...
Next Permutation
A sequence of $N$ distinct integers is called a permutation if all the integers are between $1$ and ...
Binary Pigeons
There are $N$ pigeons standing one after another in a straight line. There are two kinds of pigeons:...
Help Sakib!
Sakib likes competitive programming. Often he takes part in online programming contests. But due to ...
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