Matching BracketsYou will be given a sequence of opening and closing brackets of ... 
Count the ChaosImagine, you have an array of integers of size N. At each index ... 
CrayonsFive friends A, B, C, D and E has come to a shop to buy crayons ...

Easy Prime!There are N numbers in an array. You will have Q queries. In eac...

Dengue Affected AreasDengue, the talk of the town of Dhaka this year. So many people ...

City of AtlantisHave you ever heard of The Atlantis City? It’s a Greek mythologi...

Another Query on StringYou are given a string S (of length n) consisting of alphabets o...

Rio and InversionOne day Rio was returning home from his university and unfortuna...

Subarray SumYou are given an array having N integers. You have to select at ...

Byang and War TacticsByang is learning about War Tactics from Raat, a famous martial ...

Sofdor Ali and Bracket SequenceSofdor Ali has invented a new game. He asked his assistant Jong ... 
Data StructureThe operations that are performed in a data structure can be cat...

Smallest SubarrayYou are given an array A of N integers A1, A2, A3, …, AN . If we...

Array SimulationYou are given an array of N elements. Initially all the indices ...

Device IDA device ID is a distinct number associated with a smartphone or... 
Primary Key“ClarityLon” is the new awesome ecommerce based startup that w...

Special PairMr. X is an “array pagla” person. He loves doing different types...

Village Fair 2There are N houses in a village far away from here. They are num... 
Maintain the Queue“Ajob Desh” is a strange country. Anyone who wants to buy train ...

Subset of SequencesYou will be given a set of sequences. Each sequence is a list of...

Perseus and The New ChallengeThe life of princess Andromeda, the daughter of King Cepheus and...

Mario and Princess PeachThe world of Mario can be imagined as 2D grid of N rows and M co...

Final Days of GoldfingerWe see agent Bond once again being called in time of a great nee...

Smart Query HandlerBit operators perform bitwise operations between two binary num... 
Earthquake!Most houses are not as safe as they could be. Earthquake enginee...

Expandable ListViewMinas is working on his new language. He want to add a feature c...

New Year CoupleThe new year 2017 is here. To celebrate the 31st night, Mr Rio h... 
Another UpdateQuery ProblemYou will be given an array A of length N and you will have to pe...

Cut the RopeFahim is a rope seller. He has a special tool for cutting ropes....

Battle of EndorAfter myriad battles and death of million rebel soldiers, it is ...

Tree QueriesYou are given a tree of n vertices. Each vertex contains an inte... 
Binary Search Tree

Fenwick Tree

Linear Data Structure

Merge Sort Tree

Palindromic Tree

Prefix Tree

Segment Tree

Wavelet Tree
