TitleDifficultyCompaniesVideos
Populate next pointer to right node in Binary TreeMediumamazon bloomberg facebook google microsoft oracle
Range Sum Query 2D - ImmutableMediumamazon apple cruise-automation facebook google houzz lyft microsoft vmware
Reconstruct ItineraryHardamazon apple bloomberg citadel facebook goldman-sachs google microsoft qualtrics snapchat square twilio uber yandex yelp
Rectangle Area - Total area of two rectanglesMediumapple facebook microsoft nvidia juniper
Remove K DigitsMediumadobe amazon bloomberg bytedance didi facebook google microsoft nutanix oracle snapchat vmware
Reverse Words in a String 2Mediumamazon google microsoft uber vmware
Reverse Words in a String 3Easyamazon apple bloomberg microsoft paypal salesforce snapchat yahoo zappos
Rotate n x n matrix by 90 degreesMediumadobe akuna-capital amazon apple bloomberg cisco facebook google groupon houzz lyft microsoft nvidia palantir palantir-technologies quora salesforce uber wish yandex
Search in Rotated Sorted Array 2 - Check if number exists - Duplicates allowedMediumadobe amazon bloomberg facebook google microsoft
Select Copy Paste 1 - Minimum operationsMediumbloomberg microsoft
Serialize and Deserialize Binary TreeHardamazon apple bloomberg citadel ebay expedia facebook google groupon indeed linkedin microsoft oracle qualtrics quora salesforce snapchat tableau uber vmware yahoo
Shortest Palindrome 1 - Prepending charactersHardadobe amazon bloomberg facebook google microsoft oracle pocket-gems
Spiral Matrix 1 - ReturnMediumadobe amazon apple bloomberg bytedance cisco drawbridge ebay epic-systems facebook goldman-sachs google hulu linkedin microsoft oracle paypal quip robinhood snapchat uber visa
Square root of an integerEasyamazon apple bloomberg facebook google huawei linkedin lyft microsoft qualtrics uber wayfair
Sudoku SolverHardadobe amazon apple arista-networks doordash dropbox expedia facebook google microsoft oracle riot-games roblox snapchat uber vmware wish
Swap Nodes in PairsMediumadobe amazon apple bloomberg ebay facebook google lyft microsoft oracle sap uber
Unique BSTs 2 - GenerateMediumadobe amazon apple facebook microsoft yahoo
Valid NumberHardadobe amazon apple facebook google linkedin microsoft tripadvisor
Valid SudokuMediumadobe amazon apple bloomberg cruise-automation doordash facebook google microsoft oracle pinterest roblox salesforce snapchat twitter uber vmware
Validate Binary Search TreeMediumadobe amazon apple asana atlassian bloomberg bytedance capital-one ebay facebook goldman-sachs google linkedin mathworks microsoft oracle salesforce sap tripadvisor uber visa vmware yahoo yandex
Word Break 2 - Construct a sentenceHardamazon apple audible bloomberg bookingcom dropbox ebay facebook google microsoft oracle pinterest snapchat twitter uber zillow
Zigzag IteratorMediumamazon apple cruise-automation facebook google microsoft yandex
Validate IP AddressMediumamazon cisco facebook google microsoft twitter uber
Implement Rand10() Using Rand7()Mediumapple bloomberg bytedance linkedin microsoft
Sliding Window MedianHardamazon apple facebook google microsoft snapchat spotify
Permutation in StringMediumamazon bloomberg facebook google lyft microsoft uber yahoo yandex
Shuffle the ArrayEasyadobe microsoft
Find Duplicate SubtreesMediumamazon bloomberg facebook google lyft microsoft oracle uber
Most Common WordEasyamazon apple google microsoft oracle
Max Area of IslandMediumadobe affirm amazon apple bloomberg bytedance cruise-automation doordash facebook google intuit mathworks microsoft oracle palantir-technologies qualtrics twitch uber wish zillow
Design SkiplistHardebay google microsoft pure-storage twitter
Count Odd Numbers in an Interval RangeEasymicrosoft
Sum of Subarray MinimumsMediumapple hulu microsoft
Check Completeness of a Binary TreeMediumamazon bytedance facebook google microsoft oracle
Kth Missing Positive NumberEasymicrosoft
Number of ProvincesMediumadobe amazon atlassian bloomberg drawbridge ebay facebook goldman-sachs google linkedin microsoft pocket-gems salesforce twitter two-sigma uber
Shortest Path in Binary MatrixMediumamazon facebook google microsoft uber
Subarray Sum Equals KMediumadobe amazon apple bloomberg ebay expedia facebook goldman-sachs google indeed linkedin microsoft oracle quora snapchat twilio uber wish yahoo yandex
Possible BipartitionMediumapple facebook google microsoft
Print Binary TreeMediumfacebook linkedin microsoft poynt uber
Circular Array LoopMediumgoogle microsoft nutanix
Island PerimeterEasyamazon apple bloomberg facebook google microsoft
Minimum Number of Arrows to Burst BalloonsMediumamazon facebook google microsoft quora
All O`one Data StructureHardamazon bloomberg facebook google linkedin microsoft uber
Encode N-ary Tree to Binary TreeHardmicrosoft
Find All Duplicates in an ArrayMediumamazon apple bloomberg facebook google lyft microsoft pocket-gems
Flatten a Multilevel Doubly Linked ListMediumamazon apple bloomberg facebook google microsoft uber
Add StringsEasyadobe airbnb amazon apple bloomberg bytedance facebook google microsoft nvidia oracle snapchat square
Convert Number to Hexadecimal Number ProblemEasyfacebook microsoft
Trapping Rain Water 2Hardamazon apple bytedance facebook google microsoft twitter