Data Structure Problems
Subarray SumYou are given an array having N integers. You have to select at most K positions in the array and re...
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Easy Prime!There are N numbers in an array. You will have Q queries. In each query, you can make 2 operations. ...
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Tree QueriesYou are given a tree of n vertices. Each vertex contains an integer. Vertex 1 is the root of the tre...
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Matching BracketsYou will be given a sequence of opening and closing brackets of different types ((, ), [, ], {, and ...
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Another Query on StringYou are given a string S (of length n) consisting of alphabets only. You need to perform m queries o...
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CrayonsFive friends A, B, C, D and E has come to a shop to buy crayons for their art project. They need cra...
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Hamming DistanceHamming distance between two binary strings of equal length is the number of mismatches between ever...
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Subset of SequencesYou will be given a set of sequences. Each sequence is a list of numbers. Two sequences are K-simil...
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Distinct DishtingYou are given an array of N integers. Then there will be Q commands of the following type: 1) Chang...
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Mad Engineer AksirCan you imagine? Mad Engineer Aksir finally got the job. His job is to set up toggle switch for a s...
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Count the ChaosImagine, you have an array of integers of size N. At each index of this array is a unique integer fr...
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ModuloLet’s get straight into the problem. In ths problem, here will be multiple test cases. In each test ...
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City of AtlantisHave you ever heard of The Atlantis City? It’s a Greek mythological city. Its existence doesn’t matt...
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Dengue Affected AreasDengue, the talk of the town of Dhaka this year. So many people suffered from dengue fever and a num...
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Dynamic TreeYou are given a tree containing N vertices. The vertices are numbered from 1 to N. A tree with N ver...
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Byang and War TacticsByang is learning about War Tactics from Raat, a famous martial arts master, who has successfully tr...
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Sofdor Ali and Bracket SequenceSofdor Ali has invented a new game. He asked his assistant Jong Bahadur ( who happens to be a monkey...
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Data StructureThe operations that are performed in a data structure can be categorized into two types: query and u...
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Smallest SubarrayYou are given an array A of N integers A1, A2, A3, …, AN . If we select two indices (1 ≤ i ≤ j ≤ N) ...
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Array SimulationYou are given an array of N elements. Initially all the indices have a value of 0. You have to do fo...
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Device IDA device ID is a distinct number associated with a smartphone or similar handheld device. Every smar...
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Primary Key“Clarity-Lon” is the new awesome e-commerce based startup that went to the top of the chart within...
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Rio and InversionOne day Rio was returning home from his university and unfortunately lost his phone on the way. He a...
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Special PairMr. X is an “array pagla” person. He loves doing different types of things with arrays. Today Mr. X ...
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Village Fair 2There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...
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Maintain the Queue“Ajob Desh” is a strange country. Anyone who wants to buy train tickets need to go to the railway st...
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Perseus and The New ChallengeThe life of princess Andromeda, the daughter of King Cepheus and Queen Cassiopeia of Ados, is in dan...
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Mario and Princess PeachThe world of Mario can be imagined as 2D grid of N rows and M columns–containing a total of N × M ce...
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Final Days of GoldfingerWe see agent Bond once again being called in time of a great need. The vile criminal Auric Goldfinge...
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Smart Query HandlerBit operators perform bit-wise operations between two binary numbers. Wikipedia says, binary operat...
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Earthquake!Most houses are not as safe as they could be. Earthquake engineering is an interdisciplinary branch ...
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Expandable ListViewMinas is working on his new language. He want to add a feature call expandable listview. Here he exp...
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