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44 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
Word Search 1 - Find if word exists	medium		adobe amazon apple
Binary Tree Inorder Traversal	easy	-	alibaba amazon apple
Validate Binary Search Tree	medium		adobe amazon apple
Maximum Depth of Binary Tree	easy		adobe amazon apple
Balanced Binary Tree	easy	-	adobe amazon apple
Surrounded Regions	medium	-	amazon ebay facebook
Binary Tree Postorder Traversal	easy	-	adobe amazon facebook
Course Schedule 2 - Get Ordered Courses	medium	-	airbnb amazon apple
Lowest Common Ancestor of a Binary Search Tree	medium		adobe amazon bloomberg
Lowest Common Ancestor of a Binary Tree	medium		adobe airbnb amazon
Inorder Successor in Binary Search Tree	medium	-	amazon bloomberg citadel
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Binary Tree Traversal - Vertical Order Traversal	medium	-	adobe amazon bloomberg
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Reconstruct Itinerary	hard	-	amazon apple bloomberg
House Robber 3 - Houses in Binary Tree	medium	-	amazon facebook google
Nested List Weight Sum 2	medium	-	didi facebook linkedin
Path Sum 3 - Count paths from parent to child	medium	-	amazon bloomberg facebook
Serialize and Deserialize Binary Search Tree BST	medium	-	amazon bytedance ebay
The Maze 1 - Can the Ball Stop at Destination	medium	-	amazon apple facebook
Diameter Of a Binary Tree	easy	-	adobe amazon apple
Subtree of Another Tree	easy		amazon bloomberg ebay
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
Most Stones Removed with Same Row or Column	medium		google
Vertical Order Traversal of a Binary Tree	hard	-	adobe amazon bloomberg
Cousins in Binary Tree	easy	-	adobe amazon bloomberg
Maximum Level Sum of a Binary Tree	medium	-	amazon google
Jump Game 3	medium	-	microsoft
Linked List in Binary Tree	medium
Balance a Binary Search Tree	medium		amazon
Clone N-ary Tree	medium	-	amazon
Diameter Of a N-Ary Tree	medium	-	facebook google
Lowest Common Ancestor of a Binary Tree 2 - Nodes may not exist in Tree	medium	-
Lowest Common Ancestor of a Binary Tree 4 - for array of nodes	medium	-
Distance between two nodes in binary tree	medium	-	amazon
Count Sub Islands	medium
Find if Path Exists in Graph	easy
Step-By-Step Directions From a Binary Tree Node to Another	medium	-
Cousins in Binary Tree 2	medium
Level of Binary Tree with minimum sum	medium	-

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