| NSR - Nearest Smaller Element to Right of every element | | | |
| NGR - Nearest Greater Element to Right of every element | | | |
| NGL - Nearest Greater Element to Left of every element | | | |
| Score of Parentheses Problem | Medium | adobe
amazon
bytedance | |
| Find right-most cousin in a binary tree | | | |
| Number of Steps to Reduce a Number to Zero Problem | Easy | google
hrt | |
| Design Circular Queue Problem | Medium | airbnb
amazon
apple
citadel
cloudera
facebook
google
microsoft
oracle
splunk | |
| Graph Representation - Adjacency List and Map | | | |
| Graph Representation - Adjacency List (with isDirected) | | | |
| Path with Maximum Probability Problem | Medium | google | |
| Find the City With the Smallest Number of Neighbors at a Threshold Distance Problem | Medium | uber | |
| Average Waiting Time Problem | Medium | | |
| Richest Customer Wealth Problem | Easy | | |
| Camelcase Matching Problem | Medium | amazon
google | |
| Best Time To Buy And Sell Stock - Any number of times - Overlapping Transactions | Medium | | |
| Car Fleet Problem | Medium | google | |
| Maximum Length of a Concatenated String with Unique Characters | Medium | honey
microsoft
tesla | |
| Check If Two String Arrays are Equivalent Problem | Easy | | |
| Minimum Remove to Make Valid Parentheses | Medium | amazon
bloomberg
bytedance
facebook
google
microsoft | |
| Serialize and Deserialize N-Ary Tree | Hard | amazon
apple
ebay
facebook
google
linkedin
microsoft
pinterest
uber | |
| Median of Two Sorted Array of Equal or Same Size | Medium | | |
| 4Sum - Output in Sorted Order | | | |
| 4Sum 2 - 4 Different Arrays | Medium | apple | |
| Remove Covered Intervals | Medium | | |
| Longest Happy String Problem | Medium | amazon
wayfair | |
| Find minimum difference Element in sorted array | | | |
| Open the Lock Problem | Medium | amazon
bloomberg
facebook
google
uber | |
| Partition Labels Problem | Medium | amazon
apple
facebook | |
| Trim a Binary Search Tree BST | Medium | adobe
amazon
apple
bloomberg
facebook
google
microsoft
yahoo | |
| Flatten Binary Tree to Linked List in Order of Preorder Traversal | Medium | adobe
amazon
apple
bloomberg
bytedance
coupang
databricks
facebook
google
microsoft
nvidia
oracle
uber
yahoo | |
| Encode and Decode TinyURL Problem | Medium | adobe
amazon
bloomberg
facebook
google
microsoft
oracle
uber | |
| Flip Equivalent Binary Trees Problem | Medium | amazon
ebay
google | |
| Unique Length-3 Palindromic Subsequences | Medium | | |
| Check if Intervals Overlap | Easy | | |
| Decode String Problem | Medium | alibaba
amazon
appdynamics
apple
atlassian
bloomberg
bytedance
cisco
coupang
cruise-automation
ebay
facebook
google
huawei
hulu
microsoft
oracle
salesforce
snapchat
tencent
vmware
yahoo
yelp | |
| Frequency of the Most Frequent Element | Medium | | |
| Run-length Encoding | Easy | amazon | |
| Rotate an Array to Left | Medium | facebook | |
| Partition Equal Subset Sum Problem | Medium | amazon
apple
ebay
facebook
google
microsoft
paypal
uber
vmware
yahoo | |
| Find last position of target element in sorted array | | | |
| Minimum Number of Swaps to Make the String Balanced Problem | Medium | | |
| Anagram Definition | | | |
| Maximum Intervals Overlap Count | Medium | snapchat | |
| Linked List Cycle 4 - Delete cycle | Medium | | |
| Find if Path Exists in Directed Graph Problem | Easy | | |
| Find if Path Exists in Graph Problem | Easy | | |
| Convert BST to Greater Sum Tree | Medium | amazon
apple
microsoft
uber | |
| Explain x & (-x) | | | |
| Palindrome Definition | | | |
| Ugly Number Definition | | | |