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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)

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Title	Difficulty	Videos	Companies
Valid Sudoku	medium		adobe amazon apple
Sudoku Solver	hard	-	adobe amazon apple
Rotate n x n matrix by 90 degrees	medium		adobe akuna-capital amazon
Spiral Matrix 1 - Return	medium		adobe amazon apple
Spiral Matrix 2 - Generate	medium		adobe amazon apple
Unique Paths in Grid 1 - Count all paths moving right or down	medium		adobe alibaba amazon
Minimum Path Sum in matrix	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
Word Search 1 - Find if word exists	medium		adobe amazon apple
Maximal Rectangle	hard	-	adobe amazon bloomberg
Surrounded Regions	medium	-	amazon ebay facebook
Number of Islands	medium		adobe affirm alibaba
Word Search 2 - Return All Words	hard		airbnb amazon apple
Maximal Square	medium	-	adobe airbnb amazon
Find the Celebrity	medium	-	amazon apple facebook
Walls and Gates	medium	-	amazon apple bloomberg
Game of Life	medium	-	amazon bloomberg dropbox
Number of Islands II	hard	-	amazon facebook google
Sparse Matrix Multiplication	medium	-	amazon apple bloomberg
Shortest Distance from All Buildings	hard	-	amazon bytedance facebook
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Design Tic-Tac-Toe	medium	-	amazon apple bloomberg
Bomb Enemy	medium	-	amazon google uber
Kth Smallest Element in a Sorted Matrix	medium	-	adobe amazon apple
Construct Quad Tree	medium	-	amazon apple google
The Maze 1 - Can the Ball Stop at Destination	medium	-	amazon apple facebook
Longest Palindromic Subsequence 1 - Get Length	medium	-	amazon apple bloomberg
Minesweeper	medium	-	amazon bloomberg cruise-automation
01 Matrix	medium	-	amazon apple google
Maximum Vacation Days	hard	-	facebook google microsoft
Max Area of Island	medium	-	adobe affirm amazon
Flood Fill	easy	-	amazon apple bloomberg
Cherry Pickup	hard	-	adobe akuna-capital amazon
Basic Calculator 3	hard	-	amazon apple bytedance
Sliding Puzzle	hard	-	airbnb amazon facebook
Making A Large Island	hard	-	amazon facebook google
Snakes and Ladders	medium	-	amazon apple cisco
Shortest Bridge	medium	-	facebook google mckinsey
Regions Cut By Slashes	medium	-	uber
Shortest Path in Binary Matrix	medium	-	amazon facebook google