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53 problems total

Array (1906)Sorting (442)Depth First Search (316)Database (301)Breadth First Search (241)Tree (241)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Java(0)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3945)

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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
Reverse Integer	medium	-	adobe amazon apple
Regular Expression Matching	hard	-	adobe airbnb alibaba
Container With Most Water	medium		adobe amazon apple
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
Valid Parentheses	easy		adobe airbnb akuna-capital
Merge Two Sorted Linked Lists	easy		adobe airbnb alibaba
Generate Parentheses	medium	-	adobe alibaba amazon
Merge K Sorted Lists	hard		adobe airbnb alibaba
Subarray sum equals K - Return any subarray	medium	-	lyft
Swap Nodes in Pairs	medium	-	adobe amazon apple
Trapping Rain Water	hard		adobe affirm airbnb
Rotate n x n matrix by 90 degrees	medium		adobe akuna-capital amazon
Text Justification	hard	-	airbnb amazon apple
Square root of an integer	easy	-	amazon apple bloomberg
Minimum Window Substring	hard		adobe airbnb amazon
Subsets 1	medium		adobe amazon apple
Word Search 1 - Find if word exists	medium		adobe amazon apple
Merge Two Sorted Arrays	easy	-	adobe amazon apple
Decode Ways	medium		adobe amazon apple
Convert Sorted List into a height-balanced Binary search Tree	medium	-	amazon bloomberg facebook
Best Time To Buy And Sell Stock 1 - only one transaction	easy		adobe akuna-capital alibaba
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Word Ladder 1 - Get Ladder Length	hard	-	affirm amazon apple
Design LRU Cache	medium	-	adobe alibaba amazon
Min Stack	medium	-	adobe amazon apple
Read N Characters Given Read4 2 - Call Multiple Times	hard	-	amazon bloomberg facebook
Find Peak Element in a Given Array	medium	-	amazon apple bloomberg
Number of Islands	medium		adobe affirm alibaba
Product of Array Except Self	medium		adobe amazon apple
Sliding Window Maximum	hard	-	adobe alibaba amazon
Flatten 2D Vector	medium	-	airbnb apple facebook
Maximum Intervals Overlap Count	medium		amazon apple atlassian
Least Number of Perfect Squares that Sums to n	medium	-	adobe amazon apple
Move Zeroes at the end of array	easy	-	adobe amazon apple
Range Sum Query 2D - Immutable	medium	-	amazon apple cruise-automation
Largest Binary Search Tree BST Subtree	medium	-	amazon apple facebook
Flatten Nested List Iterator	medium	-	airbnb amazon apple
Intersection of Two Arrays 1 - Unique Elements	easy		amazon apple bloomberg
Water and Jug	medium	-	amazon google lyft
Convert Binary Search Tree to Sorted Doubly Linked List	medium	-	amazon bloomberg databricks
Find All Duplicates in an Array	medium	-	amazon apple bloomberg
String Compression	medium	-	akuna-capital amazon apple
Permutation in String	medium	-	amazon bloomberg facebook
Smallest Range Covering Elements from K Lists	hard	-	amazon apple facebook
Design Search Autocomplete System	hard	-	amazon apple bloomberg
Find Duplicate Subtrees	medium	-	amazon bloomberg facebook
Number of Distinct Islands	medium	-	amazon apple bloomberg
Max Stack	hard	-	amazon bloomberg facebook

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