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Company-tagged DSA problems for focused prep.

All Companies

Companies: 470 · Unique questions: 1,923 · Generated: 9/20/2025

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1,923 problems across 1 categories

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Showing 1,923 of 1,923 questions in All QuestionsDefault filters

Bulb Switcher

MEDIUM
100
F
54
A
MathBrainteaser
C++Python

Replace the Substring for Balanced String

MEDIUM
100
F
40
A
StringSliding Window
C++Python

Fill Missing Data

EASY
100
F
72
A
No topics tagged

Count All Valid Pickup and Delivery Options

HARD
100
F
65
A
MathDynamic ProgrammingCombinatorics
C++Python

Reformat Phone Number

EASY
100
F
67
A
String
C++Python

Top K Frequent Words

MEDIUM
100
F
59
A
ArrayHash TableStringTrieSortingHeap (Priority Queue)Bucket SortCounting
+6
C++Python

Insert Delete GetRandom O(1)

MEDIUM
100
F
55
A
ArrayHash TableMathDesignRandomized
+38
C++Python

Find the Number of Good Pairs II

MEDIUM
100
F
26
A
ArrayHash Table

Find the Number of Good Pairs I

EASY
100
F
86
A
ArrayHash Table

Minimum Array Changes to Make Differences Equal

MEDIUM
100
F
23
A
ArrayHash TablePrefix Sum

Find Polygon With the Largest Perimeter

MEDIUM
100
F
65
A
ArrayGreedySortingPrefix Sum

N-Repeated Element in Size 2N Array

EASY
100
F
77
A
ArrayHash Table
C++Python

Minimum Initial Energy to Finish Tasks

HARD
100
F
59
A
ArrayGreedySorting
C++Python

Split Array with Equal Sum

HARD
100
F
50
A
ArrayHash TablePrefix Sum
C++Python

Split Concatenated Strings

MEDIUM
100
F
43
A
ArrayStringGreedy
C++Python

Path Sum IV

MEDIUM
100
F
63
A
ArrayHash TableTreeDepth-First SearchBinary Tree
C++Python

Valid Parenthesis String

MEDIUM
100
F
39
A
StringDynamic ProgrammingStackGreedy
C++Python

Maximum Number of Pairs in Array

EASY
100
F
76
A
ArrayHash TableCounting

Watering Plants

MEDIUM
100
F
80
A
ArraySimulation

Number of 1 Bits

EASY
100
F
75
A
Divide and ConquerBit Manipulation
C++Python

Number of Divisible Substrings

MEDIUM
100
F
73
A
Hash TableStringCountingPrefix Sum

Design a 3D Binary Matrix with Efficient Layer Tracking

MEDIUM
100
F
66
A
ArrayHash TableDesignHeap (Priority Queue)MatrixOrdered Set

Minimum Deletions to Make Character Frequencies Unique

MEDIUM
100
F
61
A
Hash TableStringGreedySorting
C++Python

The Number of Users That Are Eligible for Discount

EASY
100
F
51
A
Database

The Users That Are Eligible for Discount

EASY
100
F
51
A
Database

Construct the Minimum Bitwise Array II

MEDIUM
100
F
35
A
ArrayBit Manipulation

Construct the Minimum Bitwise Array I

EASY
100
F
74
A
ArrayBit Manipulation

Validate Stack Sequences

MEDIUM
100
F
70
A
ArrayStackSimulation
C++Python

Maximum Number of Balls in a Box

EASY
100
F
74
A
Hash TableMathCounting
C++Python

Longest Substring with At Most K Distinct Characters

MEDIUM
100
F
49
A
Hash TableStringSliding Window
C++Python

Shortest Path in a Grid with Obstacles Elimination

HARD
100
F
46
A
ArrayBreadth-First SearchMatrix
C++Python

Logger Rate Limiter

EASY
100
F
77
A
Hash TableDesignData Stream
+2
C++Python

Jump Game VI

MEDIUM
100
F
46
A
ArrayDynamic ProgrammingQueueHeap (Priority Queue)Monotonic Queue
C++Python

Maximum Length of Subarray With Positive Product

MEDIUM
100
F
44
A
ArrayDynamic ProgrammingGreedy
C++Python

Cycle Length Queries in a Tree

HARD
100
F
58
A
ArrayTreeBinary Tree

Construct String With Repeat Limit

MEDIUM
100
F
71
A
Hash TableStringGreedyHeap (Priority Queue)Counting

The Number of Rich Customers

EASY
100
F
77
A
Database

Rank Teams by Votes

MEDIUM
100
F
59
A
ArrayHash TableStringSortingCounting
C++Python

Remove All Adjacent Duplicates in String II

MEDIUM
100
F
60
A
StringStack
C++Python

Missing Number In Arithmetic Progression

EASY
100
F
52
A
ArrayMath
C++Python