DSA Practice

627 questions

Learn DSA by topic

Review the concepts and time complexities, then solve related coding problems. Start with arrays and linked lists before moving on to trees, graphs, and dynamic programming.

92 Easy479 Med56 Hard

Showing 627 questions

627 questions

Equal Partition Array

Arrays•Mixedarraysmedium

Validate Balanced Brackets

Stack•Mixedstacks-and-queuesmedium

Insert Ingredients in Sorted Order

Linked List•Mixedlinked-listsmedium

LIFO-FIFO Data Structure Management

Stack•Mixedstacks-and-queuesmedium

Longest Distinct Character Substring

Strings•Mixed

Sum of Array Elements

Arrays•Mixedintroduction-to-arraysmedium

Maximum Contiguous Sum

Arrays•Mixedarrayskadanes-algorithm

Group Anagrams

Strings•Hash MapsGoogleAmazon

Merge Intervals

Arrays•Mixedarrayssorting

Merge Two Sorted Linked Lists

Linked List•Two PointersAmazonMicrosoft

Node Matrix Validator

Greedy•Linear ScanGoogleAmazon

Matrix Stream Evaluator

Greedy•Matrix TraversalGoogleAmazon

Reverse Character Groups

Strings•STRREV 1001SalesforceInfosys

Generate Anagrammed IDs

Strings•TOOL RETURNED IDCred

Corrupted String Recovery

Strings•RECOVER 1777831512659AmazonRazorpay

Array Reflection Height Maximization

Arrays•Pattern recognition and array traversalPhonePe

Filtered Array Indices

Arrays•TOOL RETURNED IDPayPal

Optimal Stage Index Shifts

Arrays•NEW OR EXISTING IDRazorpayOracle

Merge And Sort Segments

Arrays•New or Existing IDAccenture

Minimum Unique Material Identifiers

Arrays•NEW OR EXISTING IDFlipkart

Identify Unique Identifier

Array Element Uniqueness Checker

Unique Identifier Allocation

Peak Temperature Indices

Arrays•Array traversal and pattern recognitionPhonePeZomato

Alternate Price Variations

Arrays•Observation and IterationPaytmCred

Find Ascending Order Disruption Point

Arrays•Modified Binary SearchOracle

Peak Asteroid Index

Arrays•binary searchCred

Peak Signals in Modified Array

Arrays•Array manipulation and peak element identificationTCSAtlassian

Alternating Sum Subarray Maximum

Arrays•Alternating sum subarraySalesforceMicrosoft

Even Odd Sum Equilibrium

Arrays•Prefix sum and observationFlipkart

Min Length Alternating Subarray

Arrays•Sliding WindowPaytm

Array Transformation Under Cyclic Shifts

Arrays•cyclicity and pattern recognitionPhonePePayPal

Peak Index in Array

Arrays•Finding the maximum/minimum index with specific conditionsAmazonAtlassian

Maximum Alternating Profit

Arrays•prefix sum and sign trackingAmazon

Peak Index Locator

Arrays•Modified Binary SearchOracleAmazon

Peak Element Index

Arrays•Modified binary searchAtlassian

Local Maxima Indices

Arrays•Pattern recognition and iterationAdobe

Alternating Sequence Length

Arrays•Identifying patterns in arraysSalesforce

Maximum Alternating Sum

Arrays•prefix sum and greedyPayPal

Longest Constrained Subsequence

Arrays•Sliding WindowSalesforceMicrosoft

Peak Element Index

Arrays•Modified Binary SearchMicrosoft

Alternating Sum Maximization

Arrays•Alternating sum subarraySwiggyPaytm

Alternate Tree Fruiting

Arrays•pattern recognition, prefix sumOracle

Cyclic Array Maximization

Arrays•Prefix Sum and Cycle DetectionUber

Max Height Calculation

Recursion•MixedFlipkartAdobe

Count Unique Jumps

Recursion•MixedOracle

Combinatorial Weight Distribution

Recursion•MixedOracle

Peak Element in Rotated Array

Arrays•Modified Binary SearchMicrosoft

Consecutive Subsequence Validator

Arrays•Linear ScanSwiggy

Valid Coordinate Pairs

Stack•matching parenthesesPayPal

Boundary Length Calculator

Recursion•MixedTCSAmazon

Container Distribution Count

Recursion•MixedSalesforce

Alternating Budget Accumulation

Arrays•prefix sum modificationPayPalAdobe

Wormhole Route Combinations

Recursion•MixedInfosys

Interleaved Recursive Sequences

Recursion•MixedPaytmMicrosoft

Balanced Hyperjump Sequences

Recursion•MixedPayPal

Valid Nested Tags

Stack•Pattern recognition and application of stack data structure for parsingSwiggyPaytm

Priority Crate Management

Arrays•Stack LIFORazorpay

Circular Array Subset Sum

Arrays•Two PointersPaytm

Optimal Single Transaction Gain

Arrays•Kadane's / Prefix SumZomato

Minimized Rotation String

Arrays•String ManipulationZomatoAccenture

Duplicate Coordinate Pairs

Arrays•HashMap / HashSetAmazon

Balanced Subarray Length

Arrays•Merge Sort / Quick SortPayPal

Partition Array by Weight

Arrays•Two PointersPhonePe

Alternating Subarray Sum

Arrays•max-subarray-sumMicrosoft

Consecutive Resource Allocation

Arrays•Sliding WindowUber

Vowel Frequency Analysis

Array Rotation Alignment

Arrays•pattern recognition and rotationOracleAtlassian

Longest Distinct Circular Subsequence

Arrays•longest-substring-without-repeating-charactersUber

Valid Crate Stacking

Stack•MixedAdobe

Alternate Ingredient Sequence Length

Strings•MixedInfosysMicrosoft

Character Frequency Sorting

Strings•MixedPayPal

Consecutive Nucleotide Count

Strings•MixedAtlassianRazorpay

Valid Subsequence Verification

Stack•MixedAmazon

Cyclic Character Sequence Validator

Strings•MixedCred

Subarray Fuel Capacity Matches

Arrays•Pattern recognition and subarray formationAdobe

Maximum Subarray Product

Arrays•basic-conceptsAdobe

Consecutive Author Constraint

Strings•MixedAmazon

Alternating Signal Sequences

Strings•MixedAtlassian

Alternating Character Substrings

Strings•MixedSalesforce

String Code Replacement

Strings•MixedFlipkart

Optimal Weight Partition

Two Pointers•MixedCred

Min Length Bimodal Subsequence

Two Pointers•MixedCred

Optimal Array Partition

Two Pointers•MixedFlipkart

Cargo Stack Operations

Stack•MixedPayPal

Validate Crate Sequences

Stack•MixedSalesforce

Longest Lexical Chain

Strings•MixedSwiggyInfosys

Longest Chained Subsequence

Strings•MixedRazorpay

Consecutive Character Blocks

Strings•MixedMicrosoftSalesforce

Minimum Component Subset

Two Pointers•MixedFlipkartZomato

Lexicographical Phrase Reconstructor

Strings•MixedRazorpayOracle

Longest Prefix Chain Length

Strings•MixedPaytm

Consecutive Character Encoder

Strings•MixedUberRazorpay

Ingredient Quantity Parser

Strings•MixedPhonePe

Minimum Adjacent Swaps

Strings•MixedFlipkart

Balanced Partitioning

Two Pointers•MixedPhonePe

Balanced Package Sequence

Two Pointers•MixedSalesforce

Near-Equal Container Packing

Backtracking•MixedCredSwiggy

Subsequence Sum Threshold

Arrays•MixedUberTCS

Reconstruct Alternating Sequence

Arrays•MixedPaytm

Validate Nested Signal Pairs

Stack•MixedRazorpayAmazon

Longest Consecutive Temperature Trend

Arrays•MixedUber

Alternating Subsequence Sum

Arrays•MixedZomatoAccenture

Maximum Trade Value Optimization

Arrays•MixedAtlassian

Maximum Alternate Chest Sum

Arrays•MixedOracle

Identify Local Maxima

Arrays•Pattern recognition and iterationMicrosoft

Alternating Sum Maximization

Arrays•MixedPhonePePayPal

Longest Alternating Sequences

Arrays•MixedUberRazorpay

Substring Pattern Frequency

Strings•MixedAmazon

Top Scoring Entities

Arrays•GeneralAtlassianTCS

Alternating Sequence Length

Strings•MixedAdobeAccenture

Count Balanced Strings

Strings•MixedInfosys

Maximize Price Difference

Arrays•Basic TraversalSwiggySalesforce

Maximum Prefix Subarray Sum

Arrays•Kadane's / Prefix SumOracleAtlassian

Maximal Stock Return

Arrays•GeneralUberRazorpay

Vowel Shift Cipher

Strings•MixedUber

Weight Category Partition

Arrays•Two PointersPhonePe

Merge Unsorted Temperature Readings

Arrays•Merge Sort / Quick SortSwiggyInfosys

Optimal Product Selection

Arrays•GeneralInfosys

Cyclic Message Rotation

Arrays•String ManipulationRazorpay

Target Sum Pairs

Arrays•Two PointersPayPalFlipkart

Anagrammed Bookshelf IDs

Strings•TOOL RETURNED IDCredInfosys

Package Label Generator

Strings•STRREV 1001Atlassian

Reconstruct Tower from Reflections

Arrays•Pattern recognition and array traversalPhonePe

Lost in Text: Recovery of a Corrupted String

Strings•RECOVER 1777831512659Atlassian

Rearranging Theater Seating by Seat Popularity

Arrays•pattern sorting by custom criteriaPhonePe

Array Index Shift

Arrays•NEW OR EXISTING IDAccenture

Balanced Bracket Validator

Stack•Implementing a Stack to Validate SequencesPhonePe

Merging Segments of Student Performance

Arrays•New or Existing IDMicrosoft

Renovating Homes with Limited Materials

Arrays•NEW OR EXISTING IDAtlassian

Efficient Cargo Checker: Lost Shipments at Warehouse

Arrays•TOOL RETURNED IDAdobePhonePe

Temperature Sensor Analysis

Arrays•Array traversal and pattern recognitionPayPal

Galaxy Navigator

Arrays•binary searchAccenture

Galactic Resource Allocation

Arrays•Sliding WindowSalesforce

Galactic Signal Patterns

Arrays•Identifying patterns in arraysMicrosoft

Detecting Price Floor in Fluctuating Market

Arrays•Modified Binary SearchUberRazorpay

Galactic Transmission

Arrays•cyclicity and pattern recognitionCred

Galaxy Anomaly Detection

Arrays•Sliding WindowPayPalPhonePe

Peak Element Finder in Mountain Array

Arrays•Modified Binary SearchOracleUber

Temperature Fluctuation Analysis

Arrays•Sliding WindowPaytm

Galaxy Signal Peaks

Arrays•Array manipulation and peak element identificationRazorpay

Galactic Resource Allocation

Arrays•prefix sum and greedyCred

Balance Array Partition

Arrays•Prefix sum and observationInfosysSwiggy

Consecutive Subarray Product

Arrays•Sliding WindowRazorpay

Galactic Trade Route Optimization

Arrays•Alternating sum subarrayAmazon

Galactic Trade Route Optimization

Arrays•prefix sum and sign trackingSwiggy

Astronomical Data Analysis

Arrays•Pattern recognition and iterationUber

Galaxy Temperature Peaks

Arrays•Modified binary searchAmazon

Fluctuating Stock Prices

Arrays•Observation and IterationFlipkart

Optimal Harvest Index

Arrays•Finding the maximum/minimum index with specific conditionsOracle

Galaxy Height Mapper

Recursion•MixedOracleUber

Galactic Cargo Distribution

Recursion•MixedPayPal

Intergalactic Travel Planner

Recursion•MixedTCS

Interstellar Cargo Distribution

Recursion•MixedAtlassian

Optimal Harvest

Arrays•pattern recognition, prefix sumZomato

Interstellar Route Planner

Recursion•MixedInfosysMicrosoft

Galactic Colony Border Calculator

Recursion•MixedUber

Galactic Resource Optimization

Arrays•Prefix Sum and Cycle DetectionOracle

Galactic Cargo Router

Recursion•MixedAdobe

Galactic Supply Chain Optimizer

Recursion•MixedInfosys

Galactic Navigation Sequences

Recursion•MixedInfosys

Space Station Supply Chain Optimization

Arrays•Alternating sum subarrayPhonePeFlipkart

Astronaut's Oxygen Level Detector

Arrays•Modified Binary SearchOracle

Galaxy Navigation Peak

Arrays•Modified Binary SearchAtlassian

Asteroid Sequence Validator

Arrays•Linear ScanPaytm

Galactic Expedition Budgeting

Arrays•prefix sum modificationAmazon

Galactic Coordinate Parser

Stack•matching parenthesesAmazon

Validating XML Tags in Space Mission Logs

Stack•Pattern recognition and application of stack data structure for parsingAdobePayPal

Warehouse Inventory Management

Arrays•Stack LIFOUberOracle

Warehouse Order Optimization

Arrays•Merge Sort / Quick SortMicrosoft

Galaxy Expedition

Arrays•HashMap / HashSetPayPal

Optimizing Galactic Trade Routes

Arrays•max-subarray-sumPhonePeZomato

Optimizing Warehouse Storage

Arrays•Two PointersInfosys

Cyclic String Rotation

Arrays•String ManipulationUber

Maximum Profit from Stock Prices

Arrays•Kadane's / Prefix SumMicrosoft

Galactic Resource Allocation

Arrays•Sliding WindowTCS

Galactic Vessel Alignment

Arrays•pattern recognition and rotationRazorpay

Cargo Ship Balancing

Arrays•Two PointersAdobe

Warehouse Inventory Management

Stack•MixedOracle

Galactic Transmission Sequence

Arrays•longest-substring-without-repeating-charactersSwiggy

Analyzing Genome Sequences

Strings•MixedPayPal

Galactic Expedition Routes

Arrays•Pattern recognition and subarray formationAccenture

Galactic Trade Route Optimization

Arrays•basic-conceptsSwiggy

Galactic Translator

Strings•MixedPaytm

Valid Recipe Ingredient Sequence

Stack•MixedFlipkart

Galactic Transmission Optimization

Strings•MixedAccenturePhonePe

Galactic Transmission Decoding

Strings•MixedInfosys

Recipe Validator

Strings•MixedZomatoPhonePe

Galactic Transmission Protocol

Strings•MixedCred

Galactic Supply Chain Optimization

Two Pointers•MixedMicrosoft

Recipe Book Analyzer

Strings•MixedRazorpay

Optimizing Textbook Sequences

Strings•MixedTCS

Astronaut Food Rationing

Two Pointers•MixedSalesforcePaytm

Avoiding Asteroids in Space Travel

Backtracking•MixedTCS

Galactic Supply Chain Management

Stack•MixedAdobe

Galactic Dictionary

Strings•MixedOracle

Galactic Transmission

Strings•MixedPaytmSalesforce

Galactic Transmission Reconstructor

Strings•MixedAdobe

Decoding Recipe Ingredients

Strings•MixedInfosysSalesforce

Optimal Recipe Combination

Two Pointers•MixedFlipkart

Galactic Transmission Analyzer

Strings•MixedMicrosoft

Validating Crate Stacking Sequences

Stack•MixedZomato

Asteroid Mining Combinations

Backtracking•MixedMicrosoft

Galactic Transmission

Strings•MixedOracleAtlassian

Galactic Transmission Correction

Strings•MixedInfosys

Galactic Transmission Encoding

Strings•MixedRazorpay

Optimal Recipe Component

Two Pointers•MixedCred

Intergalactic Communication

Strings•MixedUber

Warehouse Packaging

Two Pointers•MixedAmazonTCS

Asteroid Field Navigation

Backtracking•MixedZomatoAdobe

Alternating Array Reconstruction

Arrays•MixedOracle

Optimize Galactic Trade Routes

Arrays•MixedPaytm

Temperature Fluctuation Analysis

Arrays•MixedUber

Galactic Trade Route Optimization

Arrays•MixedAdobe

Temperature Trend Analyzer

Arrays•MixedAccenture

Galaxy Anomaly Detector

Arrays•Pattern recognition and iterationInfosys

Optimizing Student Rankings with Variable-Length GPA Lists

Arrays•GeneralCred

Cargo Bay Organization

Backtracking•MixedSwiggy

Galactic Morse Encoder

Strings•MixedSwiggySalesforce

Galactic Probe Data Analysis

Arrays•MixedInfosys

Asteroid Signal Detection

Strings•MixedSwiggy

Galactic Translator

Strings•MixedSwiggy

Financial Trends

Arrays•MixedUber

Galactic Resource Allocation

Two Pointers•MixedOracle

Galactic Treasure Hunt

Arrays•MixedSalesforce

Parsing Galactic Transmission Sequences

Stack•MixedTCS

Optimal Investment Portfolio

Arrays•GeneralOracleAmazon

Ecommerce Product Recommendation

Arrays•GeneralPhonePe

Jungle Supply Chain Optimization

Trees•Linear ScanCred

Astronomy Duo

Arrays•Two PointersPhonePe

Galactic Expedition Data Processor

Arrays•Merge Sort / Quick SortSwiggy

Optimizing Portfolio Returns

Arrays•Basic TraversalAmazonUber

Galactic Cargo Sorting

Arrays•Two PointersPaytm

Galactic Message Relay

Arrays•String ManipulationSwiggy

Optimizing Warehouse Storage

Arrays•Kadane's / Prefix SumInfosys

Potion Ingredient Sequencer

Strings•Sliding WindowAccentureZomato

Calculating Total Points Scored by a Team in a Series of Matches

Arrays•Prefix SumCognizant

NEW OR EXISTING ID

NEW OR EXISTING ID

NEW OR EXISTING ID

ArraysSalesforce

NEW OR EXISTING ID

Warehouse Inventory Validation

Stack•MixedAmazon

Interstellar Message Repair

Strings•MixedUber

string vowels

ArraysRazorpayAtlassian

String Reconstruction from Character Counts

Strings•MixedRazorpay

Chef's Ingredient Rearrangement

Strings•RandomAtlassian

Balanced Subarray Extraction

Two Pointers•Two PointersAccentureAdobe

Galaxy Signal Decoding

Hashing•HashingAccenture

Maximum Triplet Oscillation

Arrays•Basic TraversalAccenturePayPal

Longest Substring with K Unique Characters

Strings•Sliding WindowPhonePe

Max Absolute Difference of Partition Extremes

Arrays•Basic TraversalPaytmSalesforce

Detecting Cyclic Substring

Strings•Fast & Slow PointersAdobe

Longest Uniform Subarray

Arrays•subarrayPhonePe

Maximal Visible Bridge Cost

Stack•Monotonic StackUberRazorpay

Galactic Transmission Decoding

Strings•Fast/Slow PointersPayPalFlipkart

Minimum Window Substring with Two Pointers

Two Pointers•Two Pointer PatternMicrosoft

Energy Grid Load Distribution

Arrays•Difference ArrayUber

Recursive String Partitioning

Strings•RecursiveZomatoFlipkart

Longest Subarray with Proportional Sum

Arrays•Prefix Sums & Monotonic StackAdobe

Equilibrium Peak Finder

Arrays•IterativeZomato

Evaluating Postfix Expressions Using Stack

Stack•Stack ProcessingMicrosoft

Galactic Cargo Comparison

Two Pointers•ComparativeAdobe

Evaluating Postfix Expressions Using a Stack

Stack•LIFOFlipkart

Intergalactic Transmission

Strings•MixedPayPal

String Reconfiguration

Strings•Mixed TopicsSalesforce

Count Decaying Pairs

Arrays•Divide and ConquerPaytm

Maximum Absolute Variance

Arrays•Basic TraversalRazorpayAmazon

Three-Way Pivot Partitioning

Arrays•Dutch National FlagPhonePe

Magnitude Range Extent

Arrays•Basic TraversalInfosys

Longest Substring with Limited Frequency Diversity

Strings•Sliding WindowAmazonTCS

Symmetry Score of a String

Strings•Two PointersPaytm

Optimized Linear Displacement Metric

Arrays•Basic TraversalUberRazorpay

Range Equilibrium Pivot

Arrays•Prefix SumSalesforce

First Odd Frequency Character

Strings•Frequency HashTCS

Shift Hash Characters

Strings•Slow/Fast PointersZomato

Crushing Heavy Boxes

Stack•LIFOMicrosoftSwiggy

Subarray Rotation Checker

Arrays•FundamentalsMicrosoft

Galactic Trade Imbalance

Arrays•CustomOracle

Vowel-Restricted Identical Border Substring

Strings•Sliding WindowSwiggyMicrosoft

Equilibrium Balancing Index

Arrays•Prefix SumPhonePe

Maximum Equal-Endpoint Subarray Sum

Arrays•Prefix SumAmazon

Maximum Position-Adjusted Gain

Arrays•Basic TraversalPhonePe

Maximum Subarray Sum with Single Element Doubling

Arrays•Kadane's AlgorithmTCSRazorpay

Dominant Array Value

Arrays•Moore's VotingSwiggy

Matching Extremes

Strings•Pointer ManipulationCognizant

Identifying Pattern Substrings

Strings•FundamentalsPhonePePayPal

Optimizing Server Latency Pairs

Two Pointers•Two PointersZomatoPhonePe

Longest Bounded Subarray with One Exclusion

Arrays•Prefix SumOracle

Maximum Weight K-Balanced Substring

Strings•Prefix Sums and Hash MapPayPalAdobe

Shortest Substring of Dominant Characters

Strings•Hash MapsCred

Closest Difference Pair

Two Pointers•Two Pointer Search (Same Direction)Amazon

Parity-Based Pointer Convergence

Two Pointers•Opposite PointersInfosys

Verify Nickname Subsequence

Strings•Two PointersInfosys

Range Constrained Subsegment

Arrays•Basic TraversalTCS

Daily Temperature Variations

Stack•Monotonic StackInfosys

Interleaved String Reconstruction

Strings•Pointer LinkagePaytm

Max Shifted Pair Score

Arrays•Basic TraversalPaytmMicrosoft

Extreme Spread Calculation

Arrays•Basic TraversalPhonePeMeesho

Equilibrium Segment Balance

Arrays•Prefix Sum / Sliding WindowPaytm

Array Amplitude

Arrays•Basic TraversalAmazonZomato

Count Step-Down Character Pairs

Strings•Revision (Fundamentals)Wipro

Finding Symmetric Opposites

Two Pointers•Two-pointer CollisionCapgemini

Magnitude Spread Calculation

Arrays•Basic TraversalCognizantTCS

Perfect Pairable String

Strings•Frequency Hash Map & Char ArraysAccenture

Midpoint Tracker on an Array Path

Two Pointers•Runner Technique (Fast and Slow Pointers)Wipro

Longest Subarray with Exact Average

Arrays•Prefix Sum and Hash MapCredSwiggy

Balanced Gemstone Exhibits

Strings•Two Pointers / Frequency TrackingFlipkart

Range Span of an Integer Sequence

Arrays•Basic TraversalTCS

Data Center Load Balancing

Arrays•Prefix Sum / Sliding WindowRazorpay

Difference of Segment Extremes

Arrays•Basic TraversalSwiggy

Longest Strictly Increasing K-Block Substring

Strings•Sliding WindowSalesforce

Balanced Vowel Casing

Strings•Fundamental - BasicsSwiggy

Maximum Length Balanced Parity Subarray

Arrays•Prefix SumPhonePe

Closest Fair Trade Pair

Two Pointers•Two Pointers (Dual Arrays)OracleTCS

Data Center Symmetry Correction

Strings•Two PointersCred

Calculate Array Range

Arrays•Basic Traversal

Parity-Indexed Extremes

Arrays•Basic Traversal

Calculate Span of Numeric Sequence

Arrays•Basic Traversal

Max Subarray Sum

Arrays•Two Pointers

Odd Depth Leaf Sum

Trees•Recursion

Minimum Conveyor Section for K Target Shipments

Two Pointers•Sliding Window with Greedy Matching

Array Element Repeater

Arrays•1 task / each of 2 patterns: Easy + Medium

Detect Duplicate Element

First Missing Positive Integer

Arrays•Mixedarraysmedium

MaxSubarrayAmplitude

Arrays•Mixedarraysmedium

Total Node Weight Calculation

Linked List•Mixedlinked-listsmedium

Binary Tree Diameter

Trees•Mixedtreesmedium

Binary Tree Common Ancestor Node

Trees•Mixedtreesmedium

Count Distinct Subsets Under Capacity

Strings•Mixedstringsmedium

Graph Connectivity Checker

Graphs•Mixedgraphsmedium

Cost-Optimized Directed Flow

Graphs•Mixeduncategorizedmedium

Minimum Node Activation Set

Arrays•Mixedarraysmedium

Minimum Directed Hops

Arrays•Mixedarraysmedium

Longest Path Visiting All Nodes with Ordered Subsequence

Graphs•Mixeduncategorizedmedium

Minimum Elements for Target Sum

Graphs•Mixeduncategorizedmedium

Maximum Subset with Three Resource Constraints

Backtracking•Mixeduncategorizedmedium

Optimal Scroll Arrangement

Backtracking•Mixeduncategorizedmedium

Non Descending Subsequence Length

Dynamic Programming•Mixeduncategorizedmedium

Minimum Threshold for Resource Allocation

Binary Search•Mixeduncategorizedmedium

Minimize Maximum Task Execution Time

Binary Search•Mixeduncategorizedmedium

Max Mineral Diversity

Hashing•Mixeduncategorizedmedium

Shortest Node-Covering Path

Graphs•Mixeduncategorizedmedium

Minimum Subsets with Bounded Sum

Greedy•Mixeduncategorizedmedium

Minimum Maximum Subarray Sum

Binary Search•Mixeduncategorizedmedium

Shortest Path via Divisibility

Graphs•Mixeduncategorizedmedium

Optimal Cargo Allocation

Greedy•Mixeduncategorizedmedium

Optimal Lane Speed Allocation

Greedy•Mixeduncategorizedmedium

Minimum Weighted Path Distance

Greedy•Mixeduncategorizedmedium

CaseInsensitiveStringComparison

Strings•Mixedstringsmedium

Unique Frequency Values

Arrays•Mixedarraysmedium

Find Array Distinct Elements

Hashing•Mixeduncategorizedmedium

Earliest Messages By Timestamp

Strings•Mixedstringsmedium

Max Priority Allocation

Greedy•Mixeduncategorizedmedium

Balanced Subsequence Sums

Hashing•Mixeduncategorizedmedium

Min Scrolls Shelves

Arrays•Mixeduncategorizedmedium

Minimum Bundle Quantities

Greedy•Mixeduncategorizedmedium

Subset Essence Target

Binary Search•Mixeduncategorizedmedium

Min Delay Path Finder

Greedy•Mixeduncategorizedmedium

Unique Messages in Graph

Graphs•Mixeduncategorizedmedium

Maximize Supply Allocation

Greedy•Mixeduncategorizedmedium

Even Distribution of Integers

Arrays•Mixeduncategorizedmedium

Optimal Storage Allocation

Greedy•Mixeduncategorizedmedium

Generate Unique Book Codes

Hashing•Mixeduncategorizedmedium

Distinct Intensity Counts

Arrays•Mixedarraysmedium

Max Colonists With Resources

Greedy•Mixeduncategorizedmedium

Minimum Routing Delay

Trees•Mixeduncategorizedmedium

Optimal Traffic Allocation

Greedy•Mixeduncategorizedmedium

Validated Vehicle Exit Sequence

Stack•Mixedbasic-data-structuresmedium

Timestamp Priority Sort

Sorting•Mixedbasic-sorting-algorithmsmedium

Unique Vehicle Intersections

Hashing•Mixedhash-mapsmedium

Reverse Encode String

Strings•Mixedstring-manipulationmedium

Maximum Root Leaf Path Sum

Trees•Mixedtree-data-structuresmedium

Partitioned Linked List Reordering

Linked List•Mixedlinked-listsmedium

Graph Depth First Traversal Order

Graphs•Mixedgraph-basicsmedium

Unique Integer Sequences

Two Pointers•Mixedtwo-pointersmedium

Dual Element Summation

Backtracking•Mixeduncategorizedmedium

Circular Array Shift

Backtracking•Mixeduncategorizedmedium

Character Distribution Equivalence

Backtracking•Mixeduncategorizedmedium

Maximum Reachable Checkpoints

Greedy•Mixeduncategorizedmedium

Resource Allocation Maximization

Greedy•Mixeduncategorizedmedium

Minimum Nodes for Complete Graph Coverage

Graphs•Mixeduncategorizedmedium

Optimal Traffic Signal Timing

Graphs•Mixeduncategorizedmedium

Min Vehicle Cargo Optimization

Binary Search•Mixeduncategorizedmedium

Shortest Hamiltonian Cycle

Graphs•Mixeduncategorizedmedium

Generate Unique Book Identifiers

Hashing•Mixeduncategorizedmedium

Maximum Crate Capacity

Dynamic Programming•Mixeduncategorizedmedium

Unique Identifier Generator

Hashing•Mixeduncategorizedmedium

Optimal Resource Distribution

Dynamic Programming•Mixeduncategorizedmedium

Optimal Shelf Arrangement

Greedy•Mixeduncategorizedmedium

Minimum Towns for Target Trade Value

Greedy•Mixeduncategorizedmedium

Count Unique Identifiers

Hashing•Mixeduncategorizedmedium

Minimize Weighted Crate Loads

Greedy•Mixeduncategorizedmedium

Remove Duplicate Identifiers

Hashing•Mixeduncategorizedmedium

Minimum Toll Route

Graphs•Mixeduncategorizedmedium

Min Distance Supply Allocation

Graphs•Mixeduncategorizedmedium

Shortest Path In Grid

Graphs•Mixeduncategorizedmedium

Supply Allocation Optimization

Greedy•Mixeduncategorizedmedium

Unique Signal Frequencies

Hashing•Mixeduncategorizedmedium

Unique Frequencies in Signal Sequence

Hashing•Mixeduncategorizedmedium

Constrained Magical Energy Sequence

Graphs•Mixeduncategorizedmedium

Optimal Speed Limit Adjustment

Stack•Mixeduncategorizedmedium

Minimize Truck Trips

Greedy•Mixeduncategorizedmedium

Optimal Traffic Signal Allocation

Graphs•Mixeduncategorizedmedium

Minimize Storage Units

Backtracking•Mixeduncategorizedmedium

Unique Identifier Combinations

Backtracking•Mixeduncategorizedmedium

Optimal Herb Allocation

Backtracking•Mixeduncategorizedmedium

Shortest Path in Constrained Grid

Graphs•Mixeduncategorizedmedium

Optimal Magical Combination

Greedy•Mixeduncategorizedmedium

Minimum Courier Distance

Graphs•Mixeduncategorizedmedium

Sorted Message Timeline

Heap•Mixeduncategorizedmedium

Optimal Resource Allocation

Arrays•Mixeduncategorizedmedium

Mars Colony Resource Allocation

Arrays•Mixeduncategorizedmedium

Mars Colony Resource Optimization

Binary Search•Mixeduncategorizedmedium

Jungle Expedition Resupply Optimization

Dynamic Programming•Mixeduncategorizedmedium

Smart Traffic Flow Optimization

Sliding Window•Mixeduncategorizedmedium

Ancient Tome Organizer

Greedy•Mixeduncategorizedmedium

Optimize Traffic Volume Allocation

Arrays•Mixeduncategorizedmedium

Count Distinct Vial Pairs

Backtracking•Mixeduncategorizedmedium

Maximum Crate Allocation

Graphs•Mixeduncategorizedmedium

Jungle Expedition Resupply

Greedy•Mixeduncategorizedmedium

Galactic Anomaly Detector

Queue•Mixeduncategorizedmedium

Maximum Temporal Node Connections

Binary Search•Mixeduncategorizedmedium

Chrono Messenger Optimization

Hashing•Mixeduncategorizedmedium

Neon Grid Infiltration

Hashing•Mixeduncategorizedmedium

Contains Duplicate

Arrays•Mixeduncategorizedmedium

Intersection of Two Arrays

Arrays•Mixeduncategorizedmedium

Generate All Subsets

Backtracking•Mixeduncategorizedmedium

Pattern : Binary Search

Binary Search•Mixeduncategorizedmedium

Search in Rotated Sorted Array

Binary Search•MixedBinarySearchArrays

Maximum Depth of Binary Tree

Trees•Mixeduncategorizedmedium

Level Order Traversal

Trees•Mixeduncategorizedmedium

Tank Water Allocation

Arrays•Mixedarraysmedium

Pattern: Sliding Window

Sliding Window•Mixeduncategorizedmedium

Pattern: Two Pointers

Two Pointers•Mixeduncategorizedmedium

Pattern: Fast & Slow pointers

Two Pointers•Mixeduncategorizedmedium

Book Availability Checker

Arrays•Mixedarraysmedium

Maximum Binary Tree Width

Arrays•Mixedarraysmedium

Pattern: Merge Intervals

Intervals•Mixeduncategorizedmedium

Find First and Last Position

Binary Search•Mixeduncategorizedmedium

Pattern: Hash Maps

Hashing•Mixeduncategorizedmedium

Minimum Size Subarray Sum

Arrays•Mixedarrayseasy

Missing Pair of Integers in Array

Arrays•Mixedarraysmedium

Sum Elements Greater Than K

Arrays•Linear ScanTCSInfosys

Phase-Alternating Signal Strength

Arrays•range-sum-query-using-prefix-sum

Equilibrium Subarray Split Queries

Arrays•range-sum-query-using-prefix-sum

Sum of All Odd Length Subarrays

Eco-Grid Effective Energy

Arrays•Range Sum Query using Prefix Sum

The Balanced Emission Period

Arrays•cumulative-array-sum

Minimum Conveyor Segment for Target Shipments

Arrays•Sliding Window / Two Pointers

Fluctuating Treasury Balance

Arrays•Range Sum Query using Prefix Sum

Optimal Range Partitioning

Arrays•range-sum-query-using-prefix-sum

Balanced Cargo Partitioning

Arrays•cumulative-array-sum

Shortest Conveyor Section for Target Shipments

Arrays•minimum-conveyor-section-for-k-target-shipments

Alternating Equilibrium Subarrays

Arrays•cumulative-array-sum

Count Subarrays with Bounded Odd Surplus

Arrays•Prefix Sum and Hash Map

ask us to return

Count of Balanced Parity Subarrays

Arrays•Prefix Sum / Hash Map

Count Divisible Subarrays

Hashing•Prefix Sum + Hash MapUber

Randomized Set Operations

Hashing•Hash Map / Dynamic ArrayRazorpay

Find Missing Elements

Arrays•Cyclic Sort / Index HashingCognizant

Word Pattern Matcher

Hashing•Hash Map / BijectionHCLZomato

Intersection of Two Arrays II

Hashing•Frequency MapSwiggy

Pair Sum Match

Hashing•Two Sum / Hash SetCapgemini

Anagram Verifier

Strings•Frequency MapSwiggy

Continuous Sequence Validator

Hashing•Hash SetAmazon

Squares of Sorted Array

Arrays•Two PointersAccentureZomato

Insert Delete Random Fast

Hashing•Hash Map / Dynamic ArrayUberRazorpay

Unique Characters Substring

Sliding Window•Sliding Window / Hash SetFlipkart

Flexible Palindrome

Two Pointers•Two PointersSwiggyZomato

Permutation Inclusion

Sliding Window•Sliding Window / Hash MapAdobe

Triplet Zero Sum

Two Pointers•Two PointersSalesforceMicrosoft

Subarray Divisible by K

Hashing•Prefix Sum + Hash MapAdobe

Subarray Product Validator

Two Pointers•Sliding WindowSalesforce

Subarrays with Sum Equal to Even Count

Arrays•Subarray Sum Equals K

Efficient Minimal Value Retrieval

Stack•Min Stack

Maximum Weighted Subset Sum

Binary Search•Binary Search on Answer

Realtime Middle Value Estimator

Heap•Median from Stream

Symmetric Substring Division

Strings•DP on Strings

Sequential Sum Frequency

Arrays•Subarray Sum Equals K

Minimum Nested Depth

Trie•Min Stack

Subsequence Sum Matches Target

Arrays•Subarray Sum Equals K

Invertible Node Chain Reversal

Linked List•Reverse Linked List

Closed Path Validator

Graphs•Cycle Detection in Graph

Subarray Sum Matches

Arrays•Subarray Sum Equals K

Subarray Sum Matches

Arrays•Subarray Sum Equals K

Custom Digit Sorting

Sorting•Counting/Radix Sort

Subarray Sum Frequency

Arrays•Subarray Sum Equals K

Longest Homogeneous Segment

Sliding Window•Sliding Window / Frequency MapPayPal

Anagram Index Finder

Sliding Window•Sliding Window / Hash MapSalesforce

Group Anagrams Together

Hashing•Hash Map / GroupingRazorpay

Unique Element Finder

Hashing•Bit Manipulation / HashingMeesho

Prefix Running Sum

Arrays•Prefix SumSwiggyPhonePe

Medieval Kingdom Package Tracker

Hashing•Sliding Window / Hash MapSwiggy

Isomorphic Strings

Hashing•Hash Map / BijectionAmazon

Find All Duplicates

Arrays•Cyclic Sort / Index HashingTCS

Max Water Container

Two Pointers•Two PointersTCS

Next Greater Element

Stack•Monotonic StackAmazon

Dutch National Flag

Two Pointers•Three Pointers / SegregationSalesforce

Character Replacement

Sliding Window•Sliding Window / Frequency MapUber

Find All Anagrams

Sliding Window•Sliding Window / Hash MapFlipkartAccenture

Sliding Window Maximum

Sliding Window•Sliding Window / Monotonic DequeMeta

Minimum Window Extractor

Sliding Window•Sliding Window / Hash MapNetflix

Sequential Synergy

Strings•Longest Common Subsequence

Triple Element Summation

Queue•Three Sum Pattern

Optimized Prefix Repository

Trie•Min Stack

Invert Interspersed Nodes

Linked List•Reverse Linked List

Minimum Cycle Basis Enumeration

Graphs•Cycle Detection in Graph

Ordinal Digit Sorting

Sorting•Counting/Radix Sort

Determine Prolonged Concordance

Strings•Longest Common Subsequence

Categorical Array Segmentation

Strings•Group Anagrams

Minimum Segment Cost

Strings•DP on Strings

Identify Prolonged String Overlap

Strings•Longest Common Subsequence

Minimizing Edits for Palindromic Decomposition

Recursion•DP on Strings

Maximum Path Product in a Tree

Dynamic Programming•DP on Trees

Character Array Cohesion

Strings•Group Anagrams

Optimal Placement of Dominant Entities

Design•N-Queens

Contiguous Score Range

Two Pointers•Sliding Window / Ordered MapUberRazorpay

Neon Grid Surveillance

Arrays•Linear ScanPaytm

Subarray Sum Finder

Hashing•Prefix Sum + Hash MapUber

Array Pivot Index

Arrays•Prefix SumHCL

Galactic Mineral Scanner

Hashing•Frequency MapInfosys

Zero Shifter

Arrays•Two PointersInfosysCognizant

Sort Array by Parity

Arrays•Two PointersZomato

Trapping Rain Water

Two Pointers•Two PointersRazorpayUber

Product Except Self

Arrays•Prefix Sum / Array TraversalRazorpay

Longest Repeating Validation

Two Pointers•Sliding Window / Ordered MapAccenture

Subarray with Given Sum

Sliding Window•Sliding WindowInfosys

Max Average Subarray

Sliding Window•Fixed Sliding WindowAmazon

Daily Temperatures

Stack•Monotonic StackFlipkart

Three-Way Array Partitioning

Sorting•Dutch National Flag

Interleaved Reversal of Nodes in a Sequence

Linked List•Reverse Linked List

Identify Cyclic Patterns in Network Structures

Graphs•Cycle Detection in Graph

Digit Distribution Sorting

Sorting•Counting/Radix Sort

Rotated Sequence Search

Recursion•Search in Rotated Array

Maximum Tree Diameter

Dynamic Programming•DP on Trees

Optimal Route Calculation

Design•Dijkstra's Algorithm

Digit Frequency Sorting

Sorting•Counting/Radix Sort

Least Significant Digit Frequency Sort

Sorting•Counting/Radix Sort

Lexical Grid Explorer

Backtracking•Word Search

Digit Distribution Sorting

Sorting•Counting/Radix Sort

Root Sum Sort

Sorting•Counting/Radix Sort

Maximizing Fractional Values

Greedy•Fractional Knapsack

Least Significant Digit Frequency Sort

Sorting•Counting/Radix Sort

Majority Element Threshold

Hashing•Boyer-Moore VotingPhonePeSwiggy

Majority Element Validator

Two Pointers•Moore's Voting

Elevation Water Accumulation

Recursion•Trapping Rainwater

Minimal Vertex Partitioning

Dynamic Programming•DP on Trees

Efficient Minimum Value Tracker

Design•Min Stack

Maximum Values in Subsequences

Sliding Window•Sliding Window Maximum

Lexical Grid Exploration

Backtracking•Word Search

Optimizing Rational Selection

Greedy•Fractional Knapsack

Frequent Digit Identifier

Math•Moore's Voting

Subarray Sum Counter

Arrays•Subarray Sum Equals K

Dynamic Minimum Keeper

Stack•Min Stack

Element Occurrence Counter

Math•Frequency Count

Minimum Value Tracker

Math•Min Stack

Running Median Calculation

Heap•Median from Stream

Invert Node Connections

Math•Reverse Linked List

Single Queue Digit

Queue•Single Number

Maximum Subsequence Value

Sliding Window•Sliding Window Maximum

Optimized Subset Selection

Greedy•Fractional Knapsack

Consecutive Next Greater Elements

Stack•Monotonic Stack

Rotated Array Minimal Element

Binary Search•Search in Rotated Array

Kth Smallest Absolute Difference

Heap•Kth Largest/Smallest

Unified Segment Set

Hashing•Merge Intervals

Character Composition Classifier

Strings•Group Anagrams

Count Distinct Subarray Elements

Hashing•Fixed Window

Sequence Optimization Problem

Queue•Matrix Chain Multiplication

String Cluster Formation

Hashing•Group Anagrams

Optimal Subtree Sum

Trees•DP on Trees

Minimal Layer Depth

Trie•Min Stack

Maximum Histogram Area

Stack•Largest Rectangle Histogram

Optimizing Space Station Oxygen Levels

Arrays•DynamicGoldman Sachs

Maximized Partition Difference

Arrays•Basic Traversal

Minimum Absolute Difference of Partition Extremes

Arrays•Basic Traversal

Cumulative Array Sum

Arrays•Prefix SumHCL

Move Zeros to End

Arrays•Two PointersCapgeminiWipro

Optimizing Space Station Supplies

Arrays•CustomNetflix

Sorted Squares

Arrays•Two PointersAmazonZomato

Find Balance Index

Arrays•Prefix SumSwiggy

Array Product Exclusions

Arrays•Prefix Sum / Array TraversalOracleTCS

Rearrange Seats by Rating

Arrays•pattern sorting by custom criteriaInfosys

Find Missing Indices

Arrays•Cyclic Sort / Index HashingHCL

First Duplicate Node

Arrays•Linear ScanInfosys

Count Unique Seven-Character Substrings

Strings•Sliding WindowAtlassian

Minimum Edits for Palindromic Substrings

Strings•MixedGoldman SachsCred

String Reversal Check

Strings•Basic String OperationsAccenture

Rearrangement Equivalence Checker

Strings•Frequency MapTCS

Pairwise Sum Equality

Two Pointers•Two PointersPaytm

Valid Palindromic Sequence

Two Pointers•Two PointersWiproMeesho

Triple Sum Zero

Two Pointers•Two PointersMicrosoftPaytm

Container Water Volume

Two Pointers•Two PointersGoogle

Maximize Element Fit Count

Trees•Linear ScanAccenture

Distinct Pair Sum Checker

Hashing•Two Sum / Hash SetInfosys

Single Occurrence Identifier

Hashing•Bit Manipulation / HashingAmazonCognizant

Minimum Alarm Window

Sliding Window•Sliding Window / Hash MapGoogle

Longest Consecutive Sequence

Hashing•Hash SetAccenture

Detect Duplicate Packages

Hashing•Sliding Window / Hash MapAmazonAccenture

Majority Element Identifier

Hashing•Boyer-Moore VotingSwiggy

Consecutive Maximum Values

Sliding Window•Sliding Window / Monotonic DequeCred

Maximum Average Subsequence

Sliding Window•Fixed Sliding WindowAccenture

Daily Temperature Threshold

Stack•Monotonic StackHCLTCS

Bracket Sequence Validator

Stack•Implementing a Stack to Validate SequencesZomato

Count of Safe XOR Permutations

Backtracking•Subsets/PermutationsMicrosoft

Symbol Pattern Verification

Hashing•Hash Map / BijectionCapgemini

Anagram Cluster Formation

Hashing•Hash Map / GroupingFlipkartAdobe

Isomorphic String Mapping

Hashing•Hash Map / BijectionCapgeminiMeesho

Partition Even Odd

Arrays•Two PointersPaytm

Subarray Sum Counter

Hashing•Prefix Sum + Hash MapAccenture

Minimal Node Identification within a Cyclic Linked List

Linked List•Floyd's Cycle DetectionPaytm

Terminal Node Detection in Circular Singly Linked Lists

Linked List•Floyd's Cycle DetectionOracle

Middle Node Value Retrieval

Linked List•Fast-Slow Pointers

Equal Payload Partition

Recursion•MixedCredMicrosoft

Combination Sum with Restrictions

Backtracking•MixedAtlassian

Valid Grid Paths

Backtracking•MixedAccentureAdobe

Unique Grid Paths

Backtracking•MixedAccenture

Grid Lexicon Verification

Backtracking•Word Search

Count Single-Child Nodes

Trees•Trees (Basic)Swiggy

Range Sum Query Using Prefix Sum

Arrays•Prefix SumCognizant

Common Element Frequencies

Hashing•Frequency MapCognizant

Maximum Profit from Scheduled Deliveries

Dynamic Programming•MixedCredPaytm

String Character Matcher

Strings•Basic List OperationsMeesho

Fascinating Frequency String

Strings•Frequency MapSwiggyWipro

Segmented Array Rearrangement

Two Pointers•Three Pointers / SegregationPayPal

Even-Odd Boundary Pairs

Arrays•Two PointersTCS

Character Frequency Counter

Strings•Frequency MapCapgemini

Longest Unique Segment

Sliding Window•Sliding Window / Hash SetTCS