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122 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
Binary Tree Bottom View	medium	-	yelp
Binary Tree Left Side View	medium	-
Binary Tree Level Order Traversal	medium		microsoft
Binary Tree Path Sum - Find all paths between any two nodes	medium	-
Binary Tree Path Sum - Maximum between any two leaves	medium	-
Binary Tree Path Sum - Maximum Sum Leaf to Root path	medium	-
Binary Tree Path Sum - Maximum Sum Root to Leaf path	medium	-
Binary Tree Path Sum - Minimum Sum Root to Leaf path	easy	-	apple
Binary Tree Top View	medium	-
Check if an element exists in a binary tree	easy	-
Check if two binary trees are mirror images of each other	medium	-
Check if two nodes in a binary tree are siblings	medium	-
Closest leaf to root in a binary tree	medium	-
Construct Binary Tree from Inorder and Level Order Traversal	medium	-
Convert a sorted doubly linked list DLL to balanced binary search tree	medium	-
Convert a sorted doubly linked list DLL to balanced binary search tree in-place	medium	-
Convert Binary Tree into Threaded Binary Tree	hard	-
Convert binary tree to its Sum tree	medium	-
Convert Heap ordered Linked List to Binary Tree	medium	-
Count Number of Leaf Nodes in Binary Tree	medium	-
Create linked lists of all the nodes at each depth for a Binary Tree	medium	-
Deepest Left Node in a Binary Tree	medium	-
Delete a binary tree completely	medium	-
Evaluate an expression tree and generate a parenthesised form	medium	-
Evaluation of Arithmetic Expression Tree	medium	-	microsoft
Find Deepest Node in a Binary Tree	easy	-	google uber
Find distance from root to given node in binary tree	medium	-
Find nodes in binary tree without siblings	medium	-
Find path from root to given node in a binary tree	medium	-
Find right-most cousin in a binary tree	medium	-
Find the depth of a node in a binary tree	medium	-
Find the height of a node in a binary tree	medium	-
Find Vertical Sum in binary Tree	medium	-
Flatten Binary Search Tree to Circular Doubly Linked List	medium	-
Flatten Binary tree to double linked list in-place	medium	-
Flatten binary tree to linked list in order of inorder traversal	medium	-
Improve search in BST with sentinel	medium	-
Inorder Successor in Binary Tree	medium	-
Locking and unlocking resources represented as binary tree nodes	medium	-	google
Lowest Common Ancestor Definition	medium	-
Lowest Common Ancestor for a n-ary Tree	medium	-	amazon
Maximum in a Binary Tree	easy	-
Merge K Sorted Lists	hard		adobe airbnb alibaba
Minimum Cost Tree From Leaf Values	medium	-
Minimum in a Binary Tree	easy	-
Minimum Length Root to Leaf BST Path for Given Sum	medium	-
Morris Traversal	hard	-	palantir
Nodes at Distance k from Leaf Nodes in Binary Tree	medium	-
Nodes at Distance k from root in Binary Tree	medium	-
Populate next pointer to inorder successor in Binary Tree	medium	-

Showing 1 to 50 of 122 results