Data Structure Problems

You will be given a sequence of opening and closing brackets of ...

• Stack
• Easy
• 85/97

Imagine, you have an array of integers of size N. At each index ...

• By TarifEzaz, backbencher16
• FenwickTree, SegmentTree, Sorting
• Hard
• 86/158

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

• By tahmedge
• FenwickTree, NumberTheory, SegmentTree
• Moderate
• 193/266
• uDebug

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

• By draak_krijger, jackal_1586
• DataStructure, Graph
• Easy
• 21/25
• uDebug

You are given an array of N integers. Then there will be Q comma...

• By faiyaz26
• DataStructure, SegmentTree
• Moderate
• 36/66
• uDebug

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

• By forthright48
• DataStructure
• Moderate
• 22/49
• uDebug

Sofdor Ali has invented a new game. He asked his assistant Jong ...

• By Labib666
• DataStructure, SuffixStructure
• Easy
• 17/35
• uDebug

The operations that are performed in a data structure can be cat...

• By TarifEzaz
• DataStructure
• Moderate
• 66/112
• uDebug

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

• DataStructure, SuffixStructure
• Moderate
• 15/23
• uDebug

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

• DataStructure
• Moderate
• 5/13
• uDebug

A device ID is a distinct number associated with a smartphone or...

• Constructive, DataStructure
• Easy
• 24/29
• uDebug

“Clarity-Lon” is the new awesome e-commerce based startup that w...

• By Kryptonyte
• DataStructure
• Easy
• 16/19
• uDebug

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

• By flash_7
• DataStructure, WaveletTree
• Moderate
• 27/30
• uDebug

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

• By MosharrafOshy
• DataStructure
• Moderate
• 4/38
• uDebug

There are N houses in a village far away from here. They are num...

• By nfssdq
• DFS, DataStructure, Graph
• Moderate
• 19/37
• uDebug

“Ajob Desh” is a strange country. Anyone who wants to buy train ...

• By biqarboy
• DataStructure
• Moderate
• 69/150
• uDebug

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

• By ridowan007
• Combinatorics, Counting, DataStructure
• Moderate
• 40/58
• uDebug

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

• By farsid.buet
• Constructive, DP, DataStructure
• Moderate
• 3/4
• uDebug

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

• By moinul.shaon
• DataStructure
• Moderate
• 30/50
• uDebug

We see agent Bond once again being called in time of a great nee...

• By kaysar59
• DataStructure
• Easy
• 29/32
• uDebug

Bit operators perform bit-wise operations between two binary num...

• DataStructure
• Easy
• 46/80
• uDebug

Most houses are not as safe as they could be. Earthquake enginee...

• By hasan169
• DataStructure
• Easy
• 12/14
• uDebug

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

• DataStructure
• Moderate
• 8/9
• uDebug

The new year 2017 is here. To celebrate the 31st night, Mr Rio h...

• By flash_7
• DataStructure, String, Trie
• Moderate
• 11/19
• uDebug

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

• By bertho_coder
• DP, DataStructure
• Moderate
• 77/123
• uDebug

You will be given an array A of length N and you will have to pe...

• By pariah
• DataStructure, DivideAndConquer
• Moderate
• 35/55
• uDebug

Fahim is a rope seller. He has a special tool for cutting ropes....

• By maruf_0011
• DataStructure
• Moderate
• 71/100
• uDebug

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

• By rumman13
• DataStructure
• Moderate
• 17/24
• uDebug

You are given a string S (of length n) consisting of alphabets o...

• By emrul_mu
• DataStructure, FenwickTree, SegmentTree
• Moderate
• 41/49

You are given a tree of n vertices. Each vertex contains an inte...

• By emrul_mu
• DataStructure, MergeSortTree
• Easy
• 19/22

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

• By emrul_mu
• DataStructure, MergeSortTree
• Moderate
• 8/23

Five friends A, B, C, D and E has come to a shop to buy crayons ...

• FenwickTree, MOSAlgorithm, SegmentTree
• Moderate
• 4/16