TitleDifficultyCompaniesVideos
Swap Every Kth Node in a LinkedList ProblemMedium
Unique Paths in Grid 1-2 - Get all paths moving right or down
Create linked lists of all the nodes at each depth for a Binary TreeMedium
Diameter Of a Binary TreeEasyadobe amazon apple atlassian baidu bloomberg bytedance facebook google intel microsoft oracle qualtrics tencent
Floyd Cycle-Finding Algorithm
K Reverse a linked listHardadobe amazon apple bytedance cisco cohesity ebay facebook google mathworks microsoft paypal vmware
Linked List Cycle 1 - Detect CycleEasyadobe amazon apple bloomberg cisco ebay facebook goldman-sachs google linkedin microsoft oracle vmware yahoo
Maximum Depth of Binary TreeEasyadobe amazon apple bloomberg bytedance facebook goldman-sachs google linkedin microsoft paypal sap uber yahoo
Populate next pointer to right node in Perfect Binary TreeMediumamazon apple bloomberg didi facebook google microsoft nutanix oracle sap vmware
Same Tree ProblemEasyamazon apple bloomberg facebook google linkedin microsoft
Sum of Left LeavesEasyadobe amazon bloomberg expedia facebook google mathworks
Validate Stack Sequences ProblemMediumgoogle linkedin
Binary Tree Preorder TraversalEasyamazon bloomberg cisco google microsoft
Stone Game ProblemMediumadobe
Best Time To Buy And Sell Stock 4 - at most k timesHardamazon apple bloomberg facebook google
Freedom Trail ProblemHardgoogle
Stone Game 2 ProblemMediumbytedancetoutiao google
Generate nth ugly numberMediumamazon oracle uber
Palindrome Partitioning ProblemMediumadobe amazon bloomberg google microsoft qualtrics uber yahoo
Maximum Profit in Job Scheduling ProblemHardairbnb bytedance cisco google ponyai
Find duplicate elements in the array with 4KB memory only
Design a data structure for generic deck of cards
Design data structures for an online book reader system
Design the classes and data structures for a call center
Boats to Save PeopleMediumamazon factset google
Find Second largest element in an arrayEasy
Find duplicate number in array containing n+1 numbers between 1 and nMediumadobe amazon apple bloomberg ebay facebook google intuit microsoft oracle salesforce tencent vmware
Kadane's Algorithm for Maximum Subarray Sum
Candy distribution ProblemHardamazon apple google microsoft salesforce uber
Binary Tree DFS Traversal
Binary Tree Level Order Traversalmicrosoft
Binary Tree Level Order Traversal - Level by LevelMediumadobe amazon apple atlassian bloomberg cisco citadel ebay expedia facebook google linkedin mathworks microsoft oracle sap uber vmware yahoo
Find Deepest Node in a Binary TreeEasygoogle uber
XOR doubly linked list Implementationgoogle
Binary Search Algo 13 - on a linked list
Merge Two Sorted Linked ListsEasyadobe airbnb alibaba amazon apple arista-networks atlassian bloomberg bytedance capital-one cisco ebay facebook google huawei indeed intel linkedin lyft microsoft oracle paypal samsung tencent uber visa vmware yahoo yandex
Stack of plates
Evaluate Reverse Polish Notation ProblemMediumamazon atlassian facebook google linkedin microsoft opendoor oracle uber vmware yandex zillow
Linked List Cycle 3 - Find length of cycle
Reverse Words in a StringMediumamazon apple bloomberg cisco citadel facebook google huawei microsoft nvidia oracle qualcomm salesforce snapchat vmware yelp zillow
Longest Palindromic Substring ProblemMediumadobe airbnb alibaba amazon appdynamics apple bloomberg cisco ebay facebook godaddy google huawei jpmorgan mathworks microsoft nutanix oracle paypal pure-storage roblox samsung sap servicenow tencent uber vmware wayfair yahoo yandex
Subsets 1 ProblemMediumadobe amazon apple atlassian bloomberg bytedance coupang ebay facebook goldman-sachs google lyft microsoft uber yahoo
Is Subsequence ProblemEasyamazon bloomberg coursera facebook google pinterest
Maximum Number of Removable Characters ProblemMedium
Subarrays vs Subsequences vs Subsets Definition
Convert String to Integer atoi ProblemMediumadobe amazon apple bloomberg cisco citadel ebay facebook goldman-sachs google linkedin microsoft nvidia oracle redfin sap tencent uber vmware zillow
Check if a Matrix is Invertible
Print all subarrays of a given array
Sum of all subarrays
Finding the most frequent element in an array of numbers from 0 to n-1