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34 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
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
Generate Parentheses	medium	-	adobe alibaba amazon
Next Permutation	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Maximum Subarray Sum	medium		adobe alibaba amazon
Merge Overlapping Intervals	medium		adobe alibaba amazon
Subsets 1	medium		adobe amazon apple
Validate Binary Search Tree	medium		adobe amazon apple
Binary Tree Level Order Traversal - Level by Level	medium		adobe amazon apple
Evaluate Reverse Polish Notation	medium	-	amazon atlassian facebook
Binary Search Tree BST Inorder Iterator	medium	-	alibaba amazon apple
Binary Tree Right Side View	medium	-	adobe amazon apple
Number of Islands	medium		adobe affirm alibaba
Kth Largest Element in an Array	medium	-	adobe airbnb alibaba
Basic Calculator 2 Problem	medium	-	airbnb amazon apple
Lowest Common Ancestor of a Binary Tree	medium		adobe airbnb amazon
Maximum Intervals Overlap Count	medium		amazon apple atlassian
Peeking Iterator	medium	-	amazon apple atlassian
Longest Increasing Subsequence	medium		adobe amazon apple
Flatten Nested List Iterator	medium	-	airbnb amazon apple
Design Hit Counter	medium	-	affirm amazon apple
Find Leaves of Binary Tree	medium	-	amazon atlassian ebay
Decode String	medium	-	alibaba amazon appdynamics
Random Pick with Weight	medium	-	amazon apple atlassian
Single Element in a Sorted Array	medium	-	amazon apple atlassian
Number of Provinces	medium	-	adobe amazon atlassian
Palindromic Substrings	medium		adobe amazon apple
Top K Frequent Words	medium	-	adobe amazon apple
Insert into a Binary Search Tree	medium	-	amazon atlassian facebook
Subarray Product Less Than K	medium	-	akuna-capital atlassian coursera
Time Based Key-Value Store	medium	-	amazon apple atlassian
Maximum Average Subtree	medium	-	amazon atlassian
Rank Teams by Votes	medium	-	atlassian google

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