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274 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
Median of Two Sorted Arrays	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
3Sum - Closest	medium	-	adobe amazon apple
4Sum	medium	-	adobe amazon apple
Remove duplicates from Sorted Array 1	easy		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
Valid Sudoku	medium		adobe amazon apple
Sudoku Solver	hard	-	adobe amazon apple
Combination Sum 1	medium		airbnb akuna-capital amazon
Combination Sum 2 - Cant Reuse same element	medium	-	adobe amazon apple
First Missing Positive	hard	-	adobe amazon apple
Trapping Rain Water	hard	-	adobe affirm airbnb
Rotate n x n matrix by 90 degrees	medium		adobe akuna-capital amazon
Jump Game 2 - Get min jumps	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Permutations of Array 2 - Array has duplicates	medium	-	adobe amazon apple
Group Anagrams	medium		adobe affirm amazon
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
Insert Interval	medium		adobe amazon apple
Spiral Matrix 2 - Generate	medium		adobe amazon apple
Unique Paths in Grid 2 - Count all paths moving right or down with obstacles	medium	-	amazon apple bloomberg
Minimum Path Sum in matrix	medium	-	adobe amazon apple
Plus One 1 - Given number as array plus one	easy	-	adobe amazon apple
Text Justification	hard	-	airbnb amazon apple
Set Matrix Zeros	medium		adobe amazon apple
Search a 2D Matrix 1 - Elements sorted row-wise and first integer of each row is greater than last element of previous row is greater than last element of previous row	medium	-	adobe amazon apple
Dutch National Flag DNF	medium		amazon apple bloomberg
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
Largest Rectangle in Histogram	hard	-	adobe amazon bloomberg
Maximal Rectangle	hard	-	adobe amazon bloomberg
Merge Two Sorted Arrays	easy	-	adobe amazon apple
Subsets 2	medium	-	amazon bloomberg facebook
Construct Binary Tree from Inorder and Preorder Traversal	medium		adobe amazon apple
Construct Binary Tree from Inorder and Postorder Traversal	medium	-	amazon bloomberg facebook
Convert Sorted Array to height-balanced Binary Search Tree	easy		airbnb amazon apple
Pascal’s Triangle 1 - Generate first n rows	easy	-	adobe amazon apple
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

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