| Count Different Palindromic Subsequences |
Hard
|
facebook
google
linkedin
pure-storage
|
|
| Find K Pairs with Smallest Sums |
Medium
|
amazon
apple
facebook
google
linkedin
microsoft
uber
|
|
| Recover a Tree From Preorder Traversal |
Hard
|
amazon
linkedin
|
|
| Find Largest Value in Each Tree Row Problem |
Medium
|
amazon
apple
facebook
linkedin
microsoft
|
|
| Binary Search Tree BST Operations - Delete |
Medium
|
amazon
apple
bloomberg
cisco
facebook
google
linkedin
microsoft
oracle
uber
yahoo
|
|
| Find Leaves of Binary Tree |
Medium
|
amazon
atlassian
ebay
google
linkedin
pocket-gems
|
|
| K closest Points to Origin |
Medium
|
amazon
apple
asana
ebay
expedia
facebook
goldman-sachs
google
linkedin
microsoft
oracle
paypal
uber
visa
yahoo
|
|
| Number of Connected Components in an Undirected Graph |
Medium
|
amazon
facebook
google
linkedin
microsoft
twitter
|
|
| Palindromic Substrings |
Medium
|
adobe
amazon
apple
atlassian
citadel
coursera
facebook
goldman-sachs
google
linkedin
mathworks
microsoft
pure-storage
roblox
twitter
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
|
|
| Building H2O |
Medium
|
amazon
linkedin
|
|
| Find And Replace in String |
Medium
|
google
linkedin
microsoft
|
|
| Flower Planting With No Adjacent |
Medium
|
linkedin
|
|
| Second Minimum Node In a Binary Tree |
Easy
|
amazon
linkedin
microsoft
uber
|
|
| User Purchase Platform |
Hard
|
linkedin
|
|
| Exclusive Time of Functions |
Medium
|
amazon
apple
facebook
google
linkedin
microsoft
oracle
uber
|
|
| Valid Triangle Number |
Medium
|
amazon
bloomberg
expedia
facebook
linkedin
microsoft
uber
|
|
| Article Views II |
Medium
|
linkedin
|
|
| Design Bounded Blocking Queue |
Medium
|
amazon
bloomberg
cloudera
google
linkedin
microsoft
oracle
uber
|
|
| New Users Daily Count |
Medium
|
linkedin
|
|
| Is Graph Bipartite |
Medium
|
amazon
dropbox
ebay
facebook
google
linkedin
liveramp
microsoft
uber
|
|
| Range Module |
Hard
|
amazon
coupang
google
linkedin
machine-zone
oracle
|
|
| Closest Binary Search Tree Value |
Easy
|
amazon
bloomberg
facebook
google
linkedin
microsoft
snapchat
|
|
| Closest Binary Search Tree Value II |
Hard
|
amazon
facebook
forusall
google
linkedin
|
|
| Accounts Merge |
Medium
|
amazon
apple
bloomberg
facebook
google
houzz
linkedin
microsoft
oracle
|
|
| Sum of Square Numbers Problem |
Medium
|
linkedin
|
|
| Max Stack Problem |
Hard
|
amazon
bloomberg
facebook
google
linkedin
lyft
microsoft
pure-storage
snapchat
twitter
|
|
| Permutations of Array 2 - Array has duplicates |
Medium
|
adobe
amazon
apple
bloomberg
facebook
linkedin
microsoft
uber
vmware
|
|
| Implement Power Function 1 |
Medium
|
adobe
amazon
apple
asana
bloomberg
ebay
facebook
goldman-sachs
google
linkedin
microsoft
morgan-stanley
oracle
uber
vmware
|
|
| Maximum Points on a Line |
Hard
|
amazon
apple
bloomberg
directi
google
inmobi
linkedin
microsoft
tripadvisor
twitter
uber
|
|
| Binary Tree Traversal - Zigzag Level Order Traversal |
Medium
|
amazon
apple
bloomberg
bytedance
ebay
facebook
google
linkedin
microsoft
oracle
qualtrics
samsung
servicenow
yahoo
|
|
| Binary Tree Upside Down |
Medium
|
google
linkedin
|
|
| Factor Combinations |
Medium
|
google
linkedin
pinterest
uber
|
|
| Least Number of Perfect Squares that Sums to n |
Medium
|
adobe
amazon
apple
cisco
ebay
facebook
godaddy
google
grammarly
linkedin
lyft
microsoft
uber
yandex
|
|
| Merge K Sorted Lists |
Hard
|
adobe
airbnb
alibaba
amazon
apple
atlassian
audible
bloomberg
box
bytedance
cisco
cohesity
cruise-automation
ebay
facebook
goldman-sachs
google
indeed
ixl
linkedin
lyft
mathworks
microsoft
nvidia
oracle
salesforce
sap
tableau
twitter
uber
vmware
wish
yahoo
yandex
zillow
|
|
| Paint House 2 - N houses with k colors with no two adjacent houses with same color |
Hard
|
facebook
google
linkedin
snapchat
|
|
| Partition List Problem |
Medium
|
amazon
apple
linkedin
microsoft
|
|
| Partition to K Equal Sum Subsets Problem |
Medium
|
amazon
bytedance
ebay
facebook
google
houzz
linkedin
microsoft
pinterest
vmware
|
|
| Serialize and Deserialize Binary Tree |
Hard
|
amazon
apple
bloomberg
citadel
ebay
expedia
facebook
google
groupon
indeed
linkedin
microsoft
oracle
qualtrics
quora
salesforce
snapchat
tableau
uber
vmware
yahoo
|
|
| Sort Characters By Frequency |
Medium
|
amazon
bloomberg
expedia
facebook
google
linkedin
uber
|
|
| Spiral Matrix 1 - Return |
Medium
|
adobe
amazon
apple
bloomberg
bytedance
cisco
drawbridge
ebay
epic-systems
facebook
goldman-sachs
google
hulu
linkedin
microsoft
oracle
paypal
quip
robinhood
snapchat
uber
visa
|
|
| Square root of an integer |
Easy
|
amazon
apple
bloomberg
facebook
google
huawei
linkedin
lyft
microsoft
qualtrics
uber
wayfair
|
|
| Valid Number Problem |
Hard
|
adobe
amazon
apple
facebook
google
linkedin
microsoft
tripadvisor
|
|
| Validate Binary Search Tree |
Medium
|
adobe
amazon
apple
asana
atlassian
bloomberg
bytedance
capital-one
ebay
facebook
goldman-sachs
google
linkedin
mathworks
microsoft
oracle
salesforce
sap
tripadvisor
uber
visa
vmware
yahoo
yandex
|
|
| Implement Rand10() Using Rand7() |
Medium
|
apple
bloomberg
bytedance
linkedin
microsoft
|
|
| Number of Provinces |
Medium
|
adobe
amazon
atlassian
bloomberg
drawbridge
ebay
facebook
goldman-sachs
google
linkedin
microsoft
pocket-gems
salesforce
twitter
two-sigma
uber
|
|
| Subarray Sum Equals K |
Medium
|
adobe
amazon
apple
bloomberg
ebay
expedia
facebook
goldman-sachs
google
indeed
linkedin
microsoft
oracle
quora
snapchat
twilio
uber
wish
yahoo
yandex
|
|
| Print Binary Tree Problem |
Medium
|
facebook
linkedin
microsoft
poynt
uber
|
|
| All O`one Data Structure Problem |
Hard
|
amazon
bloomberg
facebook
google
linkedin
microsoft
uber
|
|
| Daily Temperatures |
Medium
|
adobe
amazon
apple
bloomberg
cisco
expedia
facebook
goldman-sachs
google
linkedin
microsoft
nvidia
uber
zillow
|
|