| Find the City With the Smallest Number of Neighbors at a Threshold Distance Problem | Medium | uber | |
| Average Waiting Time | Medium | | |
| Camelcase Matching | Medium | amazon
google | |
| Best Time To Buy And Sell Stock - Any number of times - Overlapping Transactions | Medium | | |
| Car Fleet | Medium | google | |
| Maximum Length of a Concatenated String with Unique Characters | Medium | honey
microsoft
tesla | |
| Minimum Remove to Make Valid Parentheses | Medium | amazon
bloomberg
bytedance
facebook
google
microsoft | |
| Median of Two Sorted Array of Equal or Same Size | Medium | | |
| 4Sum - Output in Sorted Order | Medium | | |
| 4Sum 2 - 4 Different Arrays | Medium | apple | |
| Remove Covered Intervals | Medium | amazon | |
| Longest Happy String | Medium | amazon
wayfair | |
| Find minimum difference Element in sorted array | Medium | | |
| Open the Lock | Medium | amazon
bloomberg
facebook
google
uber
citrix | |
| Partition Labels | 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 | |
| Merge Triplets to Form Target Triplet | Medium | | |
| Encode and Decode TinyURL | Medium | adobe
amazon
bloomberg
facebook
google
microsoft
oracle
uber | |
| Flip Equivalent Binary Trees | Medium | amazon
ebay
google | |
| Maximum Product of the Length of Two Palindromic Subsequences | Medium | | |
| Eliminate Maximum Number of Monsters | Medium | | |
| Unique Length-3 Palindromic Subsequences | Medium | | |
| Decode String | 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 | | |
| Rotate an Array to Left | Medium | facebook | |
| Partition Equal Subset Sum | Medium | amazon
apple
ebay
facebook
google
microsoft
paypal
uber
vmware
yahoo | |
| Find last position of target element in sorted array | Medium | | |
| Minimum Number of Swaps to Make the String Balanced Problem | Medium | | |
| Max Intervals Overlap | Medium | | |
| Maximum Intervals Overlap Count | Medium | amazon
apple
atlassian
bloomberg
bookingcom
cisco
citadel
citrix
drawbridge
ebay
expedia
facebook
godaddy
goldman-sachs
google
lyft
microsoft
nutanix
oracle
paypal
postmates
quora
snapchat
uber
visa
yelp | |
| Linked List Cycle 4 - Delete cycle | Medium | | |
| Convert BST to Greater Sum Tree | Medium | amazon
apple
microsoft
uber | |
| Remove duplicate characters in a string | Medium | | |
| Check if given array is Palindrome OR Not | Medium | | |
| Longest Absolute File Path | Medium | amazon
apple
facebook
google
uber
wish | |
| Find index k in boolean matrix where kth row has all 0s and kth column has all 1s | Medium | | |
| Sorting a Stack using push,pop,isEmpty and peek | Medium | | |
| Implement 3 stacks in 1 array | Medium | | |
| Implement insertion sort on stack | Medium | | |
| Order-agnostic Binary Search on Sorted Array | Medium | | |
| Unique BSTs 3 - Count given node keys between m and n | Medium | | |
| Count frequency of target element in sorted array | Medium | | |
| Determine if a string has all unique characters | Medium | | |
| Find floor of target element in a sorted array | Medium | | |
| Find the nearest numbers that have same number of 1s for an integer | Medium | | |
| Implement selection sort on stack | Medium | | |
| List Combinations - Generate unique combinations from list selecting 1 element from each | Medium | | |
| Longest Substring with K Distinct Characters | Medium | google | |
| Replace all spaces in c-style string with '%20' | Medium | | |