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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
Minimum Cost to Make at Least One Valid Path in a Grid	hard	-	google
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
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
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
Dungeon Game	hard	-	amazon google microsoft
Number of Islands	medium		adobe affirm alibaba
Word Search 2 - Return All Words	hard		airbnb amazon apple
Maximal Square	medium	-	adobe airbnb amazon
Search a 2D Matrix 2 - Rows and columns are sorted	medium	-	adobe amazon apple
Paint House 2 - N houses with k colors with no two adjacent houses with same color color	hard	-	facebook google linkedin
Find the Celebrity	medium	-	amazon apple facebook
Walls and Gates	medium	-	amazon apple bloomberg
Game of Life	medium	-	amazon bloomberg dropbox
Best Meeting Point	hard	-	amazon facebook google
Smallest Rectangle Enclosing Black Pixels	hard	-	google
Range Sum Query 2D - Immutable	medium	-	amazon apple cruise-automation
Number of Islands II	hard	-	amazon facebook google
Range Sum Query 2D - Mutable	medium	-	facebook google microsoft
Sparse Matrix Multiplication	medium	-	amazon apple bloomberg
Shortest Distance from All Buildings	hard	-	amazon bytedance facebook
Number of Connected Components in an Undirected Graph	medium	-	amazon facebook google
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Design Tic-Tac-Toe	medium	-	amazon apple bloomberg
Bomb Enemy	medium	-	amazon google uber
Max Sum of Rectangle No Larger Than K	hard	-	facebook google
Kth Smallest Element in a Sorted Matrix	medium	-	adobe amazon apple
Trapping Rain Water 2	hard	-	amazon apple bytedance
Pacific Atlantic Water Flow	medium		amazon apple bloomberg
Battleships in a Board	medium	-	amazon apple facebook
Valid Word Square	easy	-	bloomberg google
Construct Quad Tree	medium	-	amazon apple google
Island Perimeter	easy		amazon apple bloomberg
The Maze 1 - Can the Ball Stop at Destination	medium	-	amazon apple facebook
Diagonal Traverse	medium	-	amazon apple ebay
The Maze 3 - Shortest Instructions to Reach the Hole	hard	-	google
The Maze 2 - Shortest Distance	medium	-	amazon facebook google
Longest Palindromic Subsequence 1 - Get Length	medium	-	amazon apple bloomberg
Minesweeper	medium	-	amazon bloomberg cruise-automation
Lonely Pixel I	medium	-	google
Lonely Pixel II	medium	-	google
01 Matrix	medium	-	amazon apple google

Showing 1 to 50 of 97 results