TitleDifficultyCompaniesVideos
Construct Binary Search Tree BST from Preorder TraversalMediumamazon facebook microsoft oracle
K closest Points to OriginMediumamazon apple asana ebay expedia facebook goldman-sachs google linkedin microsoft oracle paypal uber visa yahoo
Interval List IntersectionsMediumamazon apple bloomberg cruise-automation doordash facebook google oracle pinterest snapchat uber
Lucky Numbers in a Matrix ProblemEasyoracle
Reverse Substrings Between Each Pair of Parentheses ProblemMediumadobe oracle postmates
Implement Power Function 1Mediumadobe amazon apple asana bloomberg ebay facebook goldman-sachs google linkedin microsoft morgan-stanley oracle uber vmware
Missing Number ProblemEasyadobe amazon apple arista-networks bloomberg facebook google ibm microsoft oracle servicenow vmware zillow
Reverse Integer ProblemMediumadobe amazon apple barclays bloomberg cisco facebook google jpmorgan lyft microsoft netease oracle uber yahoo
Palindrome Number ProblemEasyadobe amazon apple bloomberg facebook google hcl jpmorgan microsoft oracle yahoo
Longest Duplicate Substring ProblemHardamazon apple google microsoft oracle
Binary Tree Traversal - Zigzag Level Order TraversalMediumamazon apple bloomberg bytedance ebay facebook google linkedin microsoft oracle qualtrics samsung servicenow yahoo
Construct Binary Tree from Inorder and Preorder TraversalMediumadobe amazon apple bloomberg bytedance citadel facebook google microsoft oracle square twitter yahoo
Convert Sorted List into a height-balanced Binary search TreeMediumamazon bloomberg facebook google lyft microsoft oracle vmware zenefits
Count of Smaller Numbers After Self ProblemHardadobe amazon apple bloomberg facebook google microsoft oracle uber
Count PrimesMediumadobe amazon apple bloomberg capital-one ebay facebook goldman-sachs google intel microsoft oracle yahoo yandex
Find Median from Data StreamHardadobe amazon apple atlassian bloomberg bytedance citadel ebay expedia facebook goldman-sachs google microsoft netflix oracle pinterest qualtrics salesforce snapchat twitter uber vmware yahoo
Merge K Sorted ListsHardadobe airbnb alibaba amazon apple atlassian audible bloomberg box bytedance cisco cohesity cruise-automation ebay facebook goldman-sachs google indeed ixl linkedin lyft mathworks microsoft nvidia oracle salesforce sap tableau twitter uber vmware wish yahoo yandex zillow
Pascal’s Triangle 2 - Return nth rowEasyamazon goldman-sachs google oracle qualtrics
Peeking IteratorMediumamazon apple atlassian ebay facebook google microsoft oracle yahoo
Populate next pointer to right node in Binary TreeMediumamazon bloomberg facebook google microsoft oracle
Remove K Digits ProblemMediumadobe amazon bloomberg bytedance didi facebook google microsoft nutanix oracle snapchat vmware
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
Sudoku Solver ProblemHardadobe 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
Valid Sudoku ProblemMediumadobe amazon apple bloomberg cruise-automation doordash facebook google microsoft oracle pinterest roblox salesforce snapchat twitter uber vmware
Validate Binary Search Tree ProblemMediumadobe 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
Remove All Adjacent Duplicates In String 1Easyamazon bloomberg facebook google oracle paypal paytm
Most Common Word ProblemEasyamazon apple google microsoft oracle
Max Area of Island ProblemMediumadobe affirm amazon apple bloomberg bytedance cruise-automation doordash facebook google intuit mathworks microsoft oracle palantir-technologies qualtrics twitch uber wish zillow
Subarray Sum Equals KMediumadobe amazon apple bloomberg ebay expedia facebook goldman-sachs google indeed linkedin microsoft oracle quora snapchat twilio uber wish yahoo yandex
Add Strings ProblemEasyadobe airbnb amazon apple bloomberg bytedance facebook google microsoft nvidia oracle snapchat square
Path Sum 3 - Count paths from parent to childMediumamazon bloomberg facebook microsoft oracle quora uber zillow
Maximum Subarray SumMediumadobe alibaba amazon apple asana atlassian bloomberg bytedance capital-one cisco citadel ebay expedia facebook goldman-sachs google ibm intel jpmorgan linkedin microsoft morgan-stanley nvidia oracle palantir-technologies paypal qualcomm salesforce sap two-sigma uber visa wayfair yahoo zillow
Find the Index of the First Occurrence in a StringEasyadobe amazon apple bloomberg citadel dropbox ebay facebook google microsoft oracle paypal pocket-gems vmware yahoo yandex
Time Based Key-Value Store ProblemMediumamazon apple atlassian databricks facebook flexport google linkedin lyft microsoft netflix oracle square stripe sumologic twitter uber vmware zillow
Convert Binary Search Tree to Sorted Doubly Linked List ProblemMediumamazon bloomberg databricks facebook google lyft microsoft oracle uber vmware
Find Duplicate File in System ProblemMediumamazon apple dropbox facebook google microsoft oracle vmware
Next Greater Element 2Mediumamazon bloomberg facebook google microsoft oracle yahoo
Backspace String Compare ProblemEasyamazon atlassian facebook google microsoft oracle uber
132 Pattern ProblemMediumamazon facebook google oracle
Design Hit CounterMediumaffirm amazon apple atlassian bloomberg bookingcom dropbox google indeed linkedin microsoft netflix oracle pinterest quip snapchat uber visa yahoo zillow
Reorganize String ProblemMediumamazon apple ebay facebook google microsoft oracle qualtrics tesla twitch twitter uber
Flatten Nested List Iterator ProblemMediumairbnb amazon apple atlassian bloomberg ebay facebook google linkedin lyft microsoft oracle pinterest snapchat splunk twitter uber vmware
Shortest Word Distance 1Easyamazon google linkedin microsoft oracle paypal uber vmware
Intersection of Two Arrays 2 - Duplicates allowedEasyamazon apple bloomberg bytedance databricks facebook google linkedin microsoft oracle salesforce uber yandex
Intersection of Two Arrays 1 - Unique ElementsEasyamazon apple bloomberg bytedance facebook google indeed jpmorgan linkedin lyft microsoft oracle two-sigma uber yelp
Longest Substring with At Most K Distinct Characters ProblemMediumamazon appdynamics bloomberg citadel coupang facebook google microsoft oracle snapchat uber wish