Data Structure Problems

Have you ever heard of The Burgerland City? The city is full of burger shops. You will surely find s...

• By emrul_mu
• BinarySearch, DataStructure, MergeSortTree
• Moderate
• 54/99 Solutions
• 385 Submissions

There are N numbers in an array. You will have Q queries. In each query, you can make 2 operations. ...

• By tahmedge
• FenwickTree, NumberTheory, SegmentTree
• Moderate
• 319/418 Solutions
• 1326 Submissions
• uDebug

You will be given a sequence of opening and closing brackets of different types ((, ), [, ], {, and ...

• Stack
• Moderate
• 360/394 Solutions
• 847 Submissions

Given two sets of integers, print the set containing the union of the two input sets. For example, g...

• DataStructure
• Moderate
• 621/724 Solutions
• 1863 Submissions
• uDebug

You are given a string S (of length n) consisting of alphabets only. You need to perform m queries o...

• By emrul_mu
• DataStructure, FenwickTree, SegmentTree
• Moderate
• 100/113 Solutions
• 301 Submissions

Imagine, you have an array of integers of size N. At each index of this array is a unique integer fr...

• By TarifEzaz, backbencher16
• FenwickTree, SegmentTree, Sorting
• Moderate
• 165/279 Solutions
• 758 Submissions

Let’s say two numbers are called “good” if their difference is at least 2. Similarly, a sequence is ...

• By Key_logger
• Greedy, Stack
• Moderate
• 154/186 Solutions
• 433 Submissions

Let’s consider an array A which is initially empty. We’ll perform two types of operation on that arr...

• By moshiur_cse15
• DataStructure
• Moderate
• 58/107 Solutions
• 570 Submissions

Let’s get into the problem directly without much description this time :D . You are given an array A...

• By RamprosadG
• BinarySearch, DataStructure
• Moderate
• 24/68 Solutions
• 203 Submissions

Sakib and Shamim are good friends. As Sakib is a little naughty, every night before exam he disturbs...

• By Amateur
• DataStructure, Stack
• Moderate
• 26/47 Solutions
• 183 Submissions

Recently the government of country S is going to construct some police stations(possibly zero) in so...

• By sohel_sec
• DP, Tree
• Moderate
• 0/1 Solutions
• 1 Submission

Byang is learning about War Tactics from Raat, a famous martial arts master, who has successfully tr...

• By forthright48
• DataStructure
• Moderate
• 23/50 Solutions
• 171 Submissions
• uDebug

Five friends A, B, C, D and E has come to a shop to buy crayons for their art project. They need cra...

• FenwickTree, MOSAlgorithm, SegmentTree
• Moderate
• 21/41 Solutions
• 150 Submissions

You know how to play hide-and-seek, right? In a group of kids, one of them is selected to be the see...

• By peppermint
• BFS, DFS, DataStructure, Tree
• Moderate
• 18/21 Solutions
• 55 Submissions

Sofdor Ali has invented a new game. He asked his assistant Jong Bahadur ( who happens to be a monkey...

• By Labib666
• DataStructure, SuffixStructure
• Moderate
• 20/38 Solutions
• 167 Submissions
• uDebug

Once again we return to Ajobshohor, the capital city and the heart of Ajobdesh. Ajobshohor’s road sy...

• By CLown1331
• EulerTour, FenwickTree, LowestCommonAncestor, MatrixExponentiation
• Moderate
• 6/7 Solutions
• 23 Submissions

“Stay at least one metre distance from others.” Corona has affected the World as well as Bangladesh....

• By RamprosadG
• DFS, Graph, Tree
• Moderate
• 9/11 Solutions
• 37 Submissions

The operations that are performed in a data structure can be categorized into two types: query and u...

• By TarifEzaz
• DataStructure
• Moderate
• 76/128 Solutions
• 283 Submissions
• uDebug

Ryo and his girlfriend love to think about challenges. One day his girlfriend gave him a challenge t...

• By AnikaTahsin
• FenwickTree, NumberTheory, SegmentTree
• Moderate
• 169/190 Solutions
• 577 Submissions

You are given an acyclic, bidirectional graph with N nodes and M edges. The nodes are numbered from ...

• By RamprosadG
• Combinatorics, Graph, Tree
• Moderate
• 21/26 Solutions
• 80 Submissions