| Range Sum Query 2D - Immutable |
Medium
|
amazon
apple
cruise-automation
facebook
google
houzz
lyft
microsoft
vmware
|
|
| Reconstruct Itinerary Problem |
Hard
|
amazon
apple
bloomberg
citadel
facebook
goldman-sachs
google
microsoft
qualtrics
snapchat
square
twilio
uber
yandex
yelp
|
|
| Remove Invalid Parentheses Problem |
Hard
|
amazon
apple
bloomberg
facebook
google
houzz
ponyai
postmates
uber
|
|
| Remove K Digits Problem |
Medium
|
adobe
amazon
bloomberg
bytedance
didi
facebook
google
microsoft
nutanix
oracle
snapchat
vmware
|
|
| Reverse Bits |
Easy
|
airbnb
amazon
apple
facebook
google
samsung
tencent
|
|
| Reverse Words in a String 2 |
Medium
|
amazon
google
microsoft
uber
vmware
|
|
| Reverse Words in a String 3 |
Easy
|
amazon
apple
bloomberg
microsoft
paypal
salesforce
snapchat
yahoo
zappos
|
|
| Rotate n x n matrix by 90 degrees |
Medium
|
adobe
akuna-capital
amazon
apple
bloomberg
cisco
facebook
google
groupon
houzz
lyft
microsoft
nvidia
palantir
palantir-technologies
quora
salesforce
uber
wish
yandex
|
|
| Search in Rotated Sorted Array 2 - Check if number exists - Duplicates allowed |
Medium
|
adobe
amazon
bloomberg
facebook
google
microsoft
|
|
| 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
|
|
| Shortest Palindrome 1 - Prepending characters |
Hard
|
adobe
amazon
bloomberg
facebook
google
microsoft
oracle
pocket-gems
|
|
| 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
|
|
| Sudoku Solver Problem |
Hard
|
adobe
amazon
apple
arista-networks
doordash
dropbox
expedia
facebook
google
microsoft
oracle
riot-games
roblox
snapchat
uber
vmware
wish
|
|
| Swap Nodes in Pairs |
Medium
|
adobe
amazon
apple
bloomberg
ebay
facebook
google
lyft
microsoft
oracle
sap
uber
|
|
| Trips and Users Problem |
Hard
|
amazon
uber
|
|
| Unique BSTs 2 - Generate |
Medium
|
adobe
amazon
apple
facebook
microsoft
yahoo
|
|
| Valid Number Problem |
Hard
|
adobe
amazon
apple
facebook
google
linkedin
microsoft
tripadvisor
|
|
| Valid Parenthesis String |
Medium
|
alibaba
amazon
bloomberg
facebook
google
|
|
| Valid Sudoku Problem |
Medium
|
adobe
amazon
apple
bloomberg
cruise-automation
doordash
facebook
google
microsoft
oracle
pinterest
roblox
salesforce
snapchat
twitter
uber
vmware
|
|
| 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
|
|
| Word Break 2 - Construct a sentence |
Hard
|
amazon
apple
audible
bloomberg
bookingcom
dropbox
ebay
facebook
google
microsoft
oracle
pinterest
snapchat
twitter
uber
zillow
|
|
| Zigzag Iterator |
Medium
|
amazon
apple
cruise-automation
facebook
google
microsoft
yandex
|
|
| Validate IP Address Problem |
Medium
|
amazon
cisco
facebook
google
microsoft
twitter
uber
|
|
| Sliding Window Median |
Hard
|
amazon
apple
facebook
google
microsoft
snapchat
spotify
|
|
| Permutation in String Problem |
Medium
|
amazon
bloomberg
facebook
google
lyft
microsoft
uber
yahoo
yandex
|
|
| Can Make Arithmetic Progression From Sequence |
Easy
|
amazon
|
|
| Sales Analysis II |
Easy
|
amazon
|
|
| Remove All Adjacent Duplicates In String 1 |
Easy
|
amazon
bloomberg
facebook
google
oracle
paypal
paytm
|
|
| Find Duplicate Subtrees |
Medium
|
amazon
bloomberg
facebook
google
lyft
microsoft
oracle
uber
|
|
| Most Common Word Problem |
Easy
|
amazon
apple
google
microsoft
oracle
|
|
| Linked List Random Node Problem |
Medium
|
amazon
facebook
google
|
|
| Max Area of Island Problem |
Medium
|
adobe
affirm
amazon
apple
bloomberg
bytedance
cruise-automation
doordash
facebook
google
intuit
mathworks
microsoft
oracle
palantir-technologies
qualtrics
twitch
uber
wish
zillow
|
|
| Exchange Seats Problem |
Medium
|
amazon
|
|
| Search Suggestions System |
Medium
|
amazon
|
|
| Human Traffic of Stadium |
Hard
|
adobe
amazon
uber
|
|
| Koko Eating Bananas Problem |
Medium
|
adobe
airbnb
amazon
facebook
google
|
|
| Check Completeness of a Binary Tree |
Medium
|
amazon
bytedance
facebook
google
microsoft
oracle
|
|
| Number of Provinces |
Medium
|
adobe
amazon
atlassian
bloomberg
drawbridge
ebay
facebook
goldman-sachs
google
linkedin
microsoft
pocket-gems
salesforce
twitter
two-sigma
uber
|
|
| Shortest Path in Binary Matrix |
Medium
|
amazon
facebook
google
microsoft
uber
|
|
| Kids With the Greatest Number of Candies |
Easy
|
amazon
|
|
| Similar String Groups Problem |
Hard
|
amazon
facebook
google
snapchat
|
|
| 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
|
|
| Island Perimeter Problem |
Easy
|
amazon
apple
bloomberg
facebook
google
microsoft
|
|
| Minimum Number of Arrows to Burst Balloons |
Medium
|
amazon
facebook
google
microsoft
quora
|
|
| All O`one Data Structure Problem |
Hard
|
amazon
bloomberg
facebook
google
linkedin
microsoft
uber
|
|
| Flatten a Multilevel Doubly Linked List Problem |
Medium
|
amazon
apple
bloomberg
facebook
google
microsoft
uber
|
|
| Strong Password Checker |
Hard
|
adobe
amazon
google
uber
|
|
| Add Strings Problem |
Easy
|
adobe
airbnb
amazon
apple
bloomberg
bytedance
facebook
google
microsoft
nvidia
oracle
snapchat
square
|
|