| Find duplicates in an array of integers within range 0 to n-1 | Medium | | |
| Majority Element 2 - With n by 3 definition | Medium | adobe
amazon
apple
bloomberg
facebook
google
microsoft
uber
zenefits | |
| Majority Element 1 - with n by 2 definition | Easy | facebook
google
microsoft
yahoo | |
| Check if Array is Consecutive Integers | Medium | | |
| Check if Array is Consecutive Positive Integers | Easy | | |
| Contains Duplicate 1 - Check if array has duplicates | Easy | adobe
airbnb
amazon
apple
bloomberg
facebook
microsoft
oracle
palantir-technologies
yahoo | |
| Find element which appears maximum number of times in the ranged array | Medium | | |
| Find most frequent element in the array | Easy | | |
| Find local minima in a given array | Medium | | |
| Find local minimum or maximum in O(1) time in an array with elements differing by plus minus 1 | Medium | | |
| Find the smallest integer that cannot be represented as sum of any subset of sorted array | Medium | | |
| Count the number of elements from one array less than or equal to elements in another array | Medium | amazon | |
| Find duplicates in a given array | Easy | | |
| Kth Smallest Element in a BST | Medium | affirm
amazon
apple
bloomberg
facebook
google
hulu
microsoft
oracle
triplebyte
uber
vmware | |
| Kth smallest absolute difference in array | Medium | | |
| Median of Two Sorted Arrays | Hard | adobe
airbnb
alibaba
amazon
apple
bloomberg
bytedance
didi
dropbox
ebay
facebook
garena
godaddy
goldman-sachs
google
houzz
huawei
jpmorgan
microsoft
oracle
rubrik
tencent
two-sigma
uber
visa
vmware
yahoo
yandex
zenefits
zillow
zulily | |
| Kth Largest Element Using Randomized Selection | Medium | | |
| Finding the Maximum Distance Between Increasing Elements in an Array | Medium | | |
| Count Occurrences of Anagram | Medium | | |
| Subtree of Another Tree | Easy | amazon
bloomberg
ebay
facebook
google
microsoft
samsung | |
| Longest Common Prefix in array of string | Easy | adobe
alibaba
amazon
apple
bloomberg
cisco
ebay
facebook
google
ibm
ixl
microsoft
oracle
pinterest
quora
snapchat
splunk
twilio
visa
yelp | |
| Find rotation count in rotated sorted array | Medium | | |
| Find Minimum in Rotated Sorted Array | Medium | amazon
apple
bloomberg
ebay
facebook
goldman-sachs
google
microsoft
oracle
salesforce
uber
vmware
wish | |
| Set Matrix Zeros | Medium | adobe
amazon
apple
audible
docusign
expedia
facebook
microsoft
oracle
paypal
salesforce
tripadvisor | |
| Find duplicate number in array with 1 to N+1 numbers with one number repeating | Easy | | |
| Linked List Cycle 2 - Find Start of a Cycle | Medium | adobe
amazon
apple
ebay
google
linkedin
microsoft
netapp | |
| Maximal Rectangle | Hard | adobe
amazon
bloomberg
citadel
facebook
google
indeed
karat
microsoft
samsung
uber
vmware
wayfair | |
| Coin Change with Fewest Number of Coins Given Infinite Supply | Medium | adobe
affirm
airbnb
amazon
apple
blackrock
bloomberg
bytedance
capital-one
ebay
facebook
goldman-sachs
google
jpmorgan
linkedin
microsoft
oracle
paypal
sap
uber
visa
vmware
yahoo
zappos
wework | |
| Finding the Critical Point in a Mountain or Valley-Shaped Array | Medium | | |
| Find the smallest subarray with a sum greater than a given integer | Medium | | |
| Rearrange array to alternate positive and negative elements | Medium | | |
| Subarray sum equals K - Return any subarray | Medium | lyft | |
| Sort an array | Medium | amazon
apple
bloomberg | |
| Binary Search on Sorted Array | Easy | amazon
microsoft | |
| Insertion Sort | | | |
| Word Squares | Hard | google
oracle | |
| House Robber | Medium | adobe
airbnb
amazon
apple
bloomberg
bytedance
cisco
ebay
expedia
goldman-sachs
google
hbo
linkedin
microsoft
quora
uber | |
| Flood Fill | Easy | amazon
apple
bloomberg
facebook
google
microsoft
palantir-technologies
qualtrics
snapchat
uber
vmware | |
| Merge Sort in a Linked list | Medium | | |
| Longest Cycle in a Directed Graph | Hard | | |
| 3Sum0 - Find three elements in an array that sum to a zero | Medium | adobe
akuna-capital
alibaba
amazon
apple
baidu
bloomberg
bytedance
cisco
citadel
citrix
coursera
doordash
ebay
expedia
facebook
goldman-sachs
google
groupon
ibm
mathworks
microsoft
oracle
paypal
postmates
qualtrics
quora
salesforce
samsung
servicenow
snapchat
splunk
square
tencent
uber
visa
vmware
works-applications
yahoo
yandex
zoho | |
| 3Sum - Classic | Medium | microsoft | |
| Two Sum | Easy | adobe
aetion
affirm
airbnb
alibaba
amazon
apple
audible
baidu
blackrock
bloomberg
bookingcom
box
bytedance
cisco
citadel
cloudera
deutsche-bank
didi
drawbridge
dropbox
ebay
emc
expedia
facebook
factset
ge-digital
godaddy
goldman-sachs
google
groupon
huawei
ibm
indeed
intel
intuit
jpmorgan
linkedin
lyft
mathworks
microsoft
morgan-stanley
netease
nvidia
oracle
paypal
qualcomm
quora
radius
roblox
salesforce
samsung
sap
servicenow
snapchat
splunk
spotify
tableau
tencent
twilio
twitter
uber
valve
visa
vmware
wish
works-applications
yahoo
yandex
yelp
zillow
zoho | |
| Meeting Rooms 1 - Can person attend all meetings | Easy | amazon
bloomberg
facebook
google
microsoft | |
| Maximum Product Subarray | Medium | adobe
akuna-capital
alibaba
amazon
bloomberg
bytedance
facebook
google
linkedin
microsoft
oracle
uber | |
| Middle of the linked list | Easy | adobe
amazon
apple
cisco
goldman-sachs
microsoft
oracle
paypal
samsung | |
| Next Permutation | Medium | adobe
amazon
apple
atlassian
bloomberg
bytedance
ebay
facebook
google
houzz
jpmorgan
microsoft
quora
rubrik
samsung
sumologic
uber | |
| Graph Valid Tree | Medium | amazon
facebook
google
linkedin
pinterest
zenefits
adobe
salesforce | |
| Find anagrams of a string in another string | Medium | amazon
bloomberg
facebook
goldman-sachs
google
microsoft
oracle
robinhood
uber | |
| Encode and Decode Strings | Medium | bloomberg
google
microsoft
square
twitter | |