Title Difficulty Companies Videos
Evaluate an expression tree and generate a parenthesised form
Falling Squares Hard amazon square uber
Fancy Sequence Hard
Find a Corresponding Node of a Binary Tree in a Clone of That Tree Easy facebook
Find Bottom Left Tree Value Medium bloomberg microsoft
Find Eventual Safe States Medium google
Find GCD of n numbers Easy amazon
Find Leaves of Binary Tree Medium amazon atlassian ebay google linkedin pocket-gems
Find nodes in binary tree without siblings
Find Size of Binary Tree
Find the depth of a node in a binary tree
Find the height of a node in a binary tree
Flatten binary tree to linked list in order of inorder traversal Medium
Given preorder traversal of a BST, check if each non-leaf node has only one child
Implement Hierarchical Locking System for Tree Structures Medium
Implement queue using linked list
Implementing a queue using a fixed-size array
Interval Scheduling Problem
K closest Points to Origin Medium amazon apple asana ebay expedia facebook goldman-sachs google linkedin microsoft oracle paypal uber visa yahoo
Largest Divisible Subset Medium adobe amazon google
Left side view of a tree Medium
Longest Substring of One Repeating Character Hard
Longest Substring with Same Letters after Replacement Medium bloomberg google pocket-gems
Maximum Binary Tree Medium amazon facebook google microsoft
Maximum in a Binary Search Tree Easy
Maximum in a Binary Tree Easy
Min Queue Problem Easy
Minimum in a Binary Search Tree Easy
Minimum Possible Integer After at Most K Adjacent Swaps On Digits Hard
My Calendar 3 Hard amazon google
Nodes at Distance k from Leaf Nodes in Binary Tree
Nodes at Distance k from root in Binary Tree
Non-overlapping Intervals Medium amazon apple bloomberg facebook google microsoft stripe
Number of Connected Components in an Undirected Graph Medium amazon facebook google linkedin microsoft twitter
Number of elements smaller than root in preorder traversal of a BST Medium
Pacific Atlantic Water Flow Medium amazon apple bloomberg facebook google microsoft oracle
Palindromic Substrings Medium adobe amazon apple atlassian citadel coursera facebook goldman-sachs google linkedin mathworks microsoft pure-storage roblox twitter uber vmware
Plus One 2 - Given number as Linked List plus one Medium amazon google
Postorder Node Iterator of Binary Tree
Print or return all the full nodes in a binary tree Easy
Print or return ancestors of a given node in binary tree
Print or return nodes between two given levels in a binary tree
Pseudo-Palindromic Paths in a Binary Tree Medium amazon
Range Sum Query - Immutable Easy amazon bloomberg facebook goldman-sachs google microsoft palantir-technologies
Replace each node in BST with subtree sum and its value Medium
Return or print all leaf nodes of a binary tree Easy
Right side view of a tree Medium
Rotting Oranges Medium
Search an element in a binary tree Easy
Shortest path in Binary Search Tree that adds up to a given value Medium