| Count Servers that Communicate |
Medium
|
amazon
google
|
|
| Check if a graph is minimally-connected |
Medium
|
facebook
|
|
| Describe and give an example of Ad-hoc, Parametric and Subtype polymorphism |
Medium
|
microsoft
|
|
| Map of Highest Peak |
Medium
|
|
|
| Construct Binary Search Tree BST from Postorder Traversal |
Medium
|
google
|
|
| Grid Game |
Medium
|
|
|
| Sort a linked list in O(n log n) time and constant space |
Medium
|
google
|
|
| Implement a 2D iterator class |
Medium
|
uber
|
|
| First Completely Painted Row or Column |
Medium
|
|
|
| Neighboring Bitwise XOR |
Medium
|
|
|
| Bitwise XOR of All Pairings |
Medium
|
|
|
| Minimize XOR |
Medium
|
|
|
| Generate random numbers from list based on given probabilities |
Medium
|
triplebyte
|
|
| Find the Prefix Common Array of Two Arrays |
Medium
|
|
|
| Minimum Length of String After Operations |
Medium
|
|
|
| Check if a Parentheses String Can Be Valid |
Medium
|
|
|
| Construct K Palindrome Strings |
Medium
|
uber
|
|
| Find Missing 1000 Numbers in Large Range |
Medium
|
two sigma
|
|
| Explaining Web Cookies to Non-Technical Person |
Medium
|
airtable
|
|
| Explaining API vs SDK to Non-Technical Person |
Medium
|
amazon
|
|
| Decrypt XOR-Encoded Hexadecimal String |
Medium
|
apple
|
|
| Merge Two Sorted Iterators |
Medium
|
two-sigma
|
|
| Alternating Add-Subtract Curried Function |
Medium
|
|
|
| Validate Mastermind Game Guesses |
Medium
|
facebook
|
|
| Interleave Ranked Song Lists for Playlist |
Medium
|
spotify
|
|
| Word Subsets |
Medium
|
amazon
facebook
google
|
|
| Nearest larger number for index in an array |
Medium
|
google
|
|
| Implement a bit array |
Medium
|
amazon
|
|
| Minimum Number of Operations to Move All Balls to Each Box |
Medium
|
|
|
| Square root of a real number |
Medium
|
|
|
| Shifting Letters II |
Medium
|
|
|
| Break a string into lines of length k without breaking words |
Medium
|
amazon
|
|
| Maximum coins from top-left to bottom-right with right or down moves |
Medium
|
zillow
|
|
| Smallest set to cover all intervals |
Medium
|
google
microsoft
|
|
| Number of Ways to Split Array |
Medium
|
|
|
| Generate a finite, but an arbitrarily large binary tree in O(1) time |
Medium
|
jane-street
|
|
| Count Vowel Strings in Ranges |
Medium
|
|
|
| Best Sightseeing Pair |
Medium
|
wayfair
|
|
| Find Largest Value in Each Tree Row |
Medium
|
amazon
apple
facebook
linkedin
microsoft
|
|
| Shortest substring containing all characters in a set |
Medium
|
square
|
|
| Minimum Number of Operations to Sort a Binary Tree by Level |
Medium
|
|
|
| Reverse Odd Levels of Binary Tree |
Medium
|
|
|
| Construct String With Repeat Limit |
Medium
|
|
|
| Maximum Average Pass Ratio |
Medium
|
|
|
| Continuous Subarrays |
Medium
|
|
|
| Find Score of an Array After Marking All Elements |
Medium
|
|
|
| Maximum Beauty of an Array After Applying Operation |
Medium
|
|
|
| Find Longest Special Substring That Occurs Thrice 2 |
Medium
|
|
|
| Find Longest Special Substring That Occurs Thrice 1 |
Medium
|
|
|
| Special Array II |
Medium
|
|
|