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23 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

All Topics(4301)Database(0)Java(0)Networking(0)Object Oriented Design(1)System Design(0)Algorithms(522)

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Title	Difficulty	Videos	Companies
Find if there is a path between two vertices in a directed graph	easy	-	google facebook amazon
Binary Tree Level Order Traversal - Level by Level	medium		adobe amazon apple
Binary Tree Traversal - Zigzag Level Order Traversal	medium	-	amazon apple bloomberg
Maximum Depth of Binary Tree	easy		adobe amazon apple
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Word Ladder 1 - Get Ladder Length	hard	-	affirm amazon apple
Surrounded Regions	medium	-	amazon ebay facebook
Course Schedule 2 - Get Ordered Courses	medium	-	airbnb amazon apple
Least Number of Perfect Squares that Sums to n	medium	-	adobe amazon apple
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Binary Tree Traversal - Vertical Order Traversal	medium	-	adobe amazon bloomberg
Coin Change with Fewest Number of Coins Given Infinite Supply	medium		adobe affirm airbnb
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Nested List Weight Sum 2	medium	-	didi facebook linkedin
Serialize and Deserialize Binary Search Tree BST	medium	-	amazon bytedance ebay
The Maze 1 - Can the Ball Stop at Destination	medium	-	amazon apple facebook
Two Sum 4 - Input is Binary Search Tree	easy	-	amazon facebook google
Cheapest Flights Within K Stops Problem	medium	-	airbnb amazon bloomberg
Making A Large Island	hard	-	amazon facebook google
All Nodes Distance K in Binary Tree	medium	-	amazon apple bloomberg
Vertical Order Traversal of a Binary Tree	hard	-	adobe amazon bloomberg
Cousins in Binary Tree	easy	-	adobe amazon bloomberg
Shortest Path in Binary Matrix	medium	-	amazon facebook google

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