City of Atlantis
Have you ever heard of The Atlantis City? It’s a Greek mythological city. Its existence doesn’t matt...
Tree Queries
You are given a tree of n vertices. Each vertex contains an integer. Vertex 1 is the root of the tre...
Mario and Princess Peach
The world of Mario can be imagined as 2D grid of $N$ rows and $M$ columns--containing a total of $N ...
Taju Kage Bunshin No Jutsu
Naruto Uzumaki is one of the strongest ninja of RUET (Rasengan University of Ebisu and Tobi), posses...
Distinctness
A substring of string S is another string S' which occurs in string S. For example: S = aaba and one...
Matching Brackets
You will be given a sequence of opening and closing brackets of different types ((, ), [, ], {, and ...
Smart Query Handler
Bit operators perform bit-wise operations between two binary numbers. Wikipedia says, binary operati...
Crayons
Five friends A, B, C, D and E has come to a shop to buy crayons for their art project. They need cra...
Distinct Dishting
You are given an array of N integers. Then there will be Q commands of the following type: Change ...
Subset of Sequences
You will be given a set of sequences. Each sequence is a list of numbers. Two sequences are K-simila...
Laser Light
A 2D grid consists of a lot of special lights bulbs, which turns on upon the incidence of a laser li...
Expandable ListView
Minas is working on his new language. He want to add a feature call expandable listview. Here he exp...
Palindrome Query I
You are given a string of length L. You have Q queries. In each query, you will be asked to either u...
Rio and Inversion
One day Rio was returning home from his university and unfortunately lost his phone on the way. He a...
Hamming Distance
Hamming distance between two binary strings of equal length is the number of mismatches between ever...
Subarray Sum
You are given an array having N integers. You have to select at most K positions in the array and re...
Memes vs. Social Media
In this era of modern technology social media is the most powerful weapon and the viral issue is the...
Sofdor Ali and Bracket Sequence
Sofdor Ali has invented a new game. He asked his assistant Jong Bahadur ( who happens to be a monkey...
Static Tree
You are given a tree containing N vertices. The vertices are numbered from 1 to N. A tree with N ver...
Cut the Rope
Fahim is a rope seller. He has a special tool for cutting ropes. But recently this tool is behaving ...
Village Fair 2
There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...
Byang and War Tactics
Byang is learning about War Tactics from Raat, a famous martial arts master, who has successfully tr...
Data Structure
The operations that are performed in a data structure can be categorized into two types: query and u...
Device ID
A device ID is a distinct number associated with a smartphone or similar handheld device. Every smar...
Perseus and The New Challenge
The life of princess Andromeda, the daughter of King Cepheus and Queen Cassiopeia of Ados, is in dan...
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