| Sum of Distances in Tree | Hard | google | |
| Optimal Account Balancing | Hard | amazon
bytedance
google
uber | |
| All O`one Data Structure | Hard | amazon
bloomberg
facebook
google
linkedin
microsoft
uber | |
| Arithmetic Slices II - Subsequence | Hard | adobe
alibaba
baidu
facebook | |
| Encode N-ary Tree to Binary Tree | Hard | microsoft | |
| K-th Smallest in Lexicographical Order | Hard | bytedance
google
hulu | |
| Strong Password Checker | Hard | adobe
amazon
google
uber | |
| Minimum Unique Word Abbreviation | Hard | google | |
| Trapping Rain Water 2 | Hard | amazon
apple
bytedance
facebook
google
microsoft
twitter | |
| Odd Even Jump | Hard | google | |
| Minimum Cost to Make Array Equal | Hard | | |
| Number of Increasing Paths in a Grid | Hard | | |
| Shortest Path to Get All Keys | Hard | airbnb
amazon
google | |
| Maximum Sum of 3 Non-Overlapping Subarrays | Hard | facebook
google | |
| K Inverse Pairs Array | Hard | works-applications | |
| Vertical Order Traversal of a Binary Tree | Hard | adobe
amazon
bloomberg
databricks
facebook
google
linkedin
microsoft
reddit
samsung | |
| Bus Routes | Hard | amazon
didi
google
uber | |
| Design Graph With Shortest Path Calculator | Hard | | |
| Longest Path With Different Adjacent Characters | Hard | | |
| Naming a Company | Hard | | |
| Number of Good Paths | Hard | | |
| Orderly Queue | Hard | amazon | |
| Perfect Rectangle | Hard | apple
google
uber | |
| Game Play Analysis V | Hard | gsn-games | |
| Maximize Score After N Operations | Hard | | |
| N-Queens 2 - Count number of distinct solutions | Hard | amazon
zenefits | |
| Rearrange String k Distance Apart | Hard | amazon
ebay
facebook
google
microsoft | |
| Smallest Rectangle Enclosing Black Pixels | Hard | google | |
| Burst Balloons | Hard | adobe
amazon
facebook
google
samsung
snapchat | |
| Substring with Largest Variance | Hard | | |
| Sliding Window Maximum | Hard | adobe
alibaba
amazon
apple
bloomberg
bytedance
citadel
coursera
databricks
facebook
google
lyft
microsoft
nutanix
oracle
pinterest
roblox
twitter
uber
vmware
wish
yelp
zenefits | |
| Boolean Parenthesization Problem | Hard | quantcast | |
| Skyline Problem | Hard | adobe
amazon
apple
databricks
facebook
goldman-sachs
google
houzz
microsoft
salesforce
tableau
twitter
uber
yelp
vmware | |
| Word Ladder 1 - Get Ladder Length | Hard | affirm
amazon
apple
audible
bloomberg
cohesity
expedia
facebook
google
linkedin
lyft
microsoft
oracle
pinterest
qualtrics
salesforce
samsung
servicenow
snapchat
spotify
square
tesla
uber
vmware
yelp
zillow | |
| Aho-Corasick Algorithm for Multi-Pattern String Search | Hard | | |
| Minimum Window Substring | Hard | adobe
airbnb
amazon
apple
bloomberg
bytedance
cohesity
deutsche-bank
directi
ebay
facebook
godaddy
goldman-sachs
google
linkedin
lyft
microsoft
nutanix
oracle
salesforce
snapchat
tencent
twitter
uber
visa
vmware
yahoo | |
| N-Queens | Hard | adobe
amazon
apple
bytedance
ebay
facebook
google
microsoft
oracle
rubrik
tableau
uber | |
| K Reverse a linked list | Hard | adobe
amazon
apple
bytedance
cisco
cohesity
ebay
facebook
google
mathworks
microsoft
paypal
vmware | |
| Allocate Mailboxes | Hard | bloomberg | |
| Build Array Where You Can Find The Maximum Exactly K Comparisons | Hard | | |
| Paint House 3 | Hard | paypal | |
| Best Time To Buy And Sell Stock 4 - at most k times | Hard | amazon
apple
bloomberg
facebook
google | |
| Count All Possible Routes | Hard | | |
| Freedom Trail | Hard | google | |
| Minimum Falling Path Sum II | Hard | google | |
| Minimum Number of Refueling Stops | Hard | amazon
baidu
google
microsoft | |
| Number of Submatrices That Sum to Target | Hard | amazon
google | |
| Number of Ways of Cutting a Pizza | Hard | google | |
| Number of Ways to Paint N × 3 Grid | Hard | akuna-capital
facebook | |
| Maximum Number of Achievable Transfer Requests | Hard | | |