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4301 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
Minimum Window Substring	hard		adobe airbnb amazon
Combinations Problem	medium	-
Subsets 1	medium		adobe amazon apple
Word Search 1 - Find if word exists	medium		adobe amazon apple
Remove duplicates from Sorted Array 2	medium	-	amazon facebook google
Search in Rotated Sorted Array 2 - Check if number exists - Duplicates allowed	medium	-	adobe amazon bloomberg
Remove duplicates from Sorted List 2	medium		adobe amazon apple
Remove duplicates from Sorted List 1	easy		adobe amazon apple
Largest Rectangle in Histogram	hard	-	adobe amazon bloomberg
Maximal Rectangle	hard	-	adobe amazon bloomberg
Partition List	medium	-	amazon apple linkedin
Scramble String	hard	-	apple google
Merge Two Sorted Arrays	easy	-	adobe amazon apple
Gray Code	medium	-	amazon apple microsoft
Subsets 2	medium	-	amazon bloomberg facebook
Decode Ways	medium		adobe amazon apple
Reverse Linked List 2 - between m and n	medium	-	adobe amazon apple
Restore IP Addresses	medium	-	adobe amazon apple
Binary Tree Inorder Traversal	easy	-	alibaba amazon apple
Unique BSTs 2 - Generate	medium	-	adobe amazon apple
Unique BSTs 1 - Count	medium	-	adobe amazon apple
Interleaving String	medium	-	amazon apple bloomberg
Validate Binary Search Tree	medium		adobe amazon apple
Recover Binary Search Tree	medium	-	amazon bloomberg facebook
Same Tree	easy		amazon apple bloomberg
Symmetric Binary Tree	easy	-	adobe alibaba amazon
Binary Tree Level Order Traversal - Level by Level	medium		adobe amazon apple
Binary Tree Traversal - Zigzag Level Order Traversal	medium	-	amazon apple bloomberg
Maximum Depth of Binary Tree	easy		adobe amazon apple
Construct Binary Tree from Inorder and Preorder Traversal	medium		adobe amazon apple
Construct Binary Tree from Inorder and Postorder Traversal	medium	-	amazon bloomberg facebook
Binary Tree Traversal - Level Order Bottom up	medium	-	adobe amazon apple
Convert Sorted Array to height-balanced Binary Search Tree	easy		airbnb amazon apple
Convert Sorted List into a height-balanced Binary search Tree	medium	-	amazon bloomberg facebook
Balanced Binary Tree	easy	-	adobe amazon apple
Minimum Depth of Binary Tree	easy	-	amazon apple facebook
Path Sum 1 - Check if root to leaf path exists	easy	-	adobe amazon apple
Path Sum 2 - find all root to leaf paths	medium	-	adobe amazon apple
Flatten binary tree to linked list in order of preorder traversal	medium	-	adobe amazon apple
Distinct Subsequences	hard	-	adobe amazon barclays
Populate next pointer to right node in Perfect Binary Tree	medium	-	amazon apple bloomberg
Populate next pointer to right node in Binary Tree	medium	-	amazon bloomberg facebook
Pascal’s Triangle 1 - Generate first n rows	easy	-	adobe amazon apple
Pascal’s Triangle 2 - Return nth row	easy	-	amazon goldman-sachs google
Maximum Triangle path sum from top to bottom	easy	-	google
Minimum Triangle path sum from top to bottom	medium	-	amazon apple bloomberg
Best Time To Buy And Sell Stock 1 - only one transaction	easy		adobe akuna-capital alibaba
Best Time To Buy And Sell Stock 2 - Any number of times	medium	-	adobe amazon apple
Best Time To Buy And Sell Stock 3 - at most twice	hard	-	amazon apple atlassian
Binary Tree Path Sum - Maximum between any two nodes	hard		adobe amazon appdynamics

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