| Lowest Common Ancestor of Deepest Leaves |
Medium
|
bloomberg
facebook
google
|
|
| Construct Binary Tree from Preorder and Postorder Traversal |
Medium
|
amazon
bloomberg
facebook
google
uber
|
|
| Letter Tile Possibilities |
Medium
|
google
microsoft
|
|
| Product of the Last K Numbers |
Medium
|
google
|
|
| Making A Large Island |
Hard
|
amazon
facebook
google
uber
|
|
| Count elements in range in sorted matrix |
Hard
|
google
|
|
| Longest subarray with distinct elements |
Easy
|
google
|
|
| Fix the variable capture in closure |
Medium
|
google
|
|
| Check if any pair of rectangles overlap |
Easy
|
google
|
|
| Area of intersection of two rectangles |
Easy
|
google
|
|
| Count Servers that Communicate |
Medium
|
amazon
google
|
|
| Split string into fewest palindromic substrings |
Hard
|
google
|
|
| Run a Markov chain and count state visits |
Easy
|
google
|
|
| Construct Binary Search Tree BST from Postorder Traversal |
Medium
|
google
|
|
| Sort a linked list in O(n log n) time and constant space |
Medium
|
google
|
|
| Minimum Cost to Make at Least One Valid Path in a Grid |
Hard
|
google
|
|
| Decode Base64 String to Hex |
Easy
|
google
|
|
| Find Closest Coin by Manhattan Distance |
Easy
|
google
|
|
| Solve System of Linear Addition Equations |
Hard
|
google
|
|
| Key-Value Store with Max Key Query |
Hard
|
google
|
|
| Implement Quack Data Structure with Three Stacks |
Hard
|
google
|
|
| Word Subsets |
Medium
|
amazon
facebook
google
|
|
| Nearest larger number for index in an array |
Medium
|
google
|
|
| Smallest set to cover all intervals |
Medium
|
google
microsoft
|
|
| Check if doubly linked list is palindrome |
Easy
|
google
|
|
| Alien Dictionary |
Hard
|
airbnb
amazon
apple
bloomberg
cohesity
doordash
facebook
flipkart
google
microsoft
pinterest
pocket-gems
snapchat
square
twitter
uber
vmware
|
|
| Binary Tree Pruning |
Medium
|
amazon
buffer-box
capital-one
google
hulu
twitter
|
|
| Delete in a Binary Search Tree |
Medium
|
amazon
apple
bloomberg
cisco
facebook
google
linkedin
microsoft
oracle
uber
yahoo
|
|
| Find Eventual Safe States |
Medium
|
google
|
|
| Find K Closest Elements |
Medium
|
amazon
apple
bloomberg
ebay
facebook
google
microsoft
snapchat
uber
|
|
| Find Leaves of Binary Tree |
Medium
|
amazon
atlassian
ebay
google
linkedin
pocket-gems
|
|
| Insert into a Binary Search Tree |
Medium
|
amazon
atlassian
facebook
google
microsoft
|
|
| 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
|
|
| Longest Substring with Same Letters after Replacement |
Medium
|
bloomberg
google
pocket-gems
|
|
| Maximum Binary Tree |
Medium
|
amazon
facebook
google
microsoft
|
|
| My Calendar 3 |
Hard
|
amazon
google
|
|
| 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
|
|
| 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
|
|
| Power of Three |
Easy
|
apple
goldman-sachs
google
hulu
|
|
| Range Sum Query - Immutable |
Easy
|
amazon
bloomberg
facebook
goldman-sachs
google
microsoft
palantir-technologies
|
|
| Rectangle Area 2 |
Hard
|
google
sumologic
|
|
| Sum of Two Integers |
Medium
|
amazon
apple
facebook
google
hulu
|
|
| Task Scheduler |
Medium
|
amazon
apple
bloomberg
facebook
google
microsoft
nutanix
oracle
pinterest
uber
vmware
|
|
| Top K Frequent Elements |
Medium
|
amazon
apple
bloomberg
bytedance
ebay
facebook
goldman-sachs
google
hulu
linkedin
microsoft
oracle
pocket-gems
snapchat
spotify
uber
vmware
yahoo
yelp
|
|
| Verify Preorder Serialization of a Binary Tree |
Medium
|
google
|
|
| Add Bold Tag in String |
Medium
|
facebook
google
wish
gusto
|
|