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115 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
Two Sum	easy		adobe aetion affirm
Add Two Numbers represented as Linked List in Reversed Order	medium	-	adobe aetion airbnb
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Median of Two Sorted Arrays	hard	-	adobe airbnb alibaba
Regular Expression Matching	hard	-	adobe airbnb alibaba
Container With Most Water	medium		adobe amazon apple
3Sum0 - Find three elements in an array that sum to a zero	medium		adobe akuna-capital alibaba
Remove Nth Node From End of List	medium		adobe amazon apple
Merge Two Sorted Linked Lists	easy		adobe airbnb alibaba
Generate Parentheses	medium	-	adobe alibaba amazon
Merge K Sorted Lists	hard		adobe airbnb alibaba
K Reverse a linked list	hard	-	adobe amazon apple
Next Permutation	medium	-	adobe amazon apple
Search in Rotated Sorted Array	medium		adobe alibaba amazon
Find first and last positions of target element in sorted array	medium	-	airbnb amazon apple
First Missing Positive	hard	-	adobe amazon apple
Trapping Rain Water	hard	-	adobe affirm airbnb
Wildcard Matching	hard	-	adobe amazon bloomberg
Permutations of Array 1	medium	-	adobe amazon apple
N-Queens	hard	-	adobe amazon apple
Maximum Subarray Sum	medium		adobe alibaba amazon
Spiral Matrix 1 - Return	medium		adobe amazon apple
Jump Game 1 - Check if it reaches last index	medium		adobe amazon apple
Merge Overlapping Intervals	medium		adobe alibaba amazon
Simplify Path	medium	-	adobe amazon bloomberg
Edit Distance	medium	-	adobe amazon apple
Minimum Window Substring	hard		adobe airbnb amazon
Subsets 1	medium		adobe amazon apple
Word Search 1 - Find if word exists	medium		adobe amazon apple
Remove duplicates from Sorted List 1	easy		adobe amazon apple
Merge Two Sorted Arrays	easy	-	adobe amazon apple
Reverse Linked List 2 - between m and n	medium	-	adobe amazon apple
Binary Tree Inorder Traversal	easy	-	alibaba amazon apple
Validate Binary Search Tree	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
Balanced Binary Tree	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
Best Time To Buy And Sell Stock 1 - only one transaction	easy		adobe akuna-capital alibaba
Binary Tree Path Sum - Maximum between any two nodes	hard		adobe amazon appdynamics
Word Break 1 - Check if word is breakable	medium		adobe amazon apple
Reorder List such that i-th element points to n-i-th element	medium		adobe amazon apple
Design LRU Cache	medium	-	adobe alibaba amazon
Sort a Linked List	medium	-	adobe amazon bytedance
Maximum Product Subarray	medium		adobe akuna-capital alibaba
Intersection of Two Linked Lists	easy	-	airbnb alibaba amazon
Find Peak Element in a Given Array	medium	-	amazon apple bloomberg
2Sum 2 – Input array is sorted	medium		amazon apple bloomberg

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