| Stable Marriage Problem | Hard | amazon |  | 
| Minimize Maximum Mouse Distance to Holes | Easy | amazon |  | 
| Bartender Drink Optimization | Medium | amazon |  | 
| Huffman Tree Character Encoding | Easy | amazon |  | 
| External Sorting of integers | Medium | amazon |  | 
| Symmetric N-ary Tree Detection | Easy | amazon |  | 
| Custom Sort String | Medium | amazon
facebook
google
uber |  | 
| Angle Between Hands of a Clock | Medium | amazon
microsoft |  | 
| All Elements in Two Binary Search Trees | Medium | amazon
facebook
oracle |  | 
| 24 Game | Hard | amazon
facebook
google
microsoft
twitter
uber |  | 
| All Paths from Source to Target | Medium | amazon
bloomberg |  | 
| Assign Mice To Holes | Easy | amazon |  | 
| Bomb Enemy | Medium | amazon
google
uber |  | 
| Bulb Switcher | Medium | amazon
facebook
mathworks |  | 
| Construct Quad Tree | Medium | amazon
apple
google
uber |  | 
| Count The Repetitions | Hard | amazon |  | 
| Critical Connections in a Network | Hard | adobe
amazon
google
microsoft
mozilla |  | 
| Data Stream as Disjoint Intervals | Hard | amazon
facebook
google
oracle |  | 
| Design Snake Game | Medium | amazon
apple
bloomberg
facebook
google
salesforce
uber
zillow |  | 
| Design Twitter (Data Structure Design) | Medium | amazon
doordash
oracle
twitter
yelp |  | 
| Dutch National Flag DNF | Medium | amazon
apple
bloomberg
ebay
facebook
google
linkedin
microsoft
oracle
paypal
pocket-gems
pure-storage
uber
vmware
yahoo |  | 
| Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree | Hard | amazon |  | 
| Find if there is a path between two vertices in a directed graph | Easy | google
facebook
amazon
microsoft |  | 
| Find K Pairs with Smallest Sums | Medium | amazon
apple
facebook
google
linkedin
microsoft
uber |  | 
| Find the Shortest Superstring | Hard | amazon
google |  | 
| Frog Jump | Hard | amazon
apple
bytedance
facebook
google
microsoft
nutanix
oracle
snapchat |  | 
| Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowed | Medium | adobe
affirm
amazon
appdynamics
apple
bloomberg
databricks
facebook
flipkart
goldman-sachs
google
indeed
linkedin
microsoft
oracle
pinterest
pocket-gems
pure-storage
quora
salesforce
twilio
twitter
two-sigma
uber
visa
vmware
yandex
yelp |  | 
| Insert Delete Search and GetRandom in Constant Time 2 - Duplicates allowed | Hard | affirm
amazon
apple
databricks
facebook
google
linkedin
microsoft
uber
yelp |  | 
| Largest Multiple of Three | Hard | amazon |  | 
| Last Stone Weight II | Medium | amazon |  | 
| Letter Case Permutation | Medium | amazon
bloomberg
facebook
microsoft
spotify
yelp |  | 
| Line Reflection | Medium | amazon
google |  | 
| Logger Rate Limiter | Easy | amazon
apple
atlassian
bloomberg
google
linkedin
microsoft
uber |  | 
| Longest Increasing Path in a Matrix | Hard | adobe
amazon
apple
bloomberg
bytedance
facebook
google
microsoft
snapchat
uber |  | 
| Longest Turbulent Subarray | Medium | amazon
bloomberg |  | 
| Matchsticks to Square | Medium | amazon
rackspace |  | 
| Maximum Frequency Stack | Hard | amazon
apple
bloomberg
google
microsoft
salesforce
uber |  | 
| Maximum Length of Pair Chain | Medium | amazon
bloomberg
facebook
uber |  | 
| Maximum Product of Splitted Binary Tree | Medium | amazon
bytedance
microsoft |  | 
| Maximum Sum BST in Binary Tree | Hard | amazon |  | 
| Minimum Cost to Merge Stones | Hard | amazon
google |  | 
| Minimum Difficulty of a Job Schedule | Hard | amazon
turvo |  | 
| Minimum Swaps To Make Sequences Increasing | Hard | amazon
facebook
google |  | 
| Network Delay Time | Medium | akuna-capital
amazon
google
microsoft
twitter |  | 
| Number of Digit One | Hard | amazon
apple |  | 
| Number of Islands II | Hard | amazon
facebook
google
microsoft
oracle
snapchat
uber |  | 
| Number of Longest Increasing Subsequence | Medium | amazon
bloomberg
facebook |  | 
| Numbers At Most N Given Digit Set | Hard | amazon |  | 
| Palindrome Permutation II | Medium | amazon
google
microsoft
uber |  | 
| Queue Reconstruction by Height | Medium | amazon
apple
bloomberg
bytedance
facebook
google
microsoft |  |