| Implement 3 stacks in 1 list |
Hard
|
microsoft
|
|
| Implement a bit array |
Medium
|
amazon
|
|
| Count Prefix and Suffix Pairs 1 |
Easy
|
|
|
| Design a Sparse Array |
Easy
|
facebook
|
|
| String Matching in an Array |
Easy
|
amazon
|
|
| Minimum Number of Operations to Move All Balls to Each Box |
Medium
|
|
|
| Design hit counter with range queries |
Easy
|
riot-games
|
|
| Square root of a real number |
Medium
|
|
|
| Shifting Letters II |
Medium
|
|
|
| Check if target word exists in matrix horizontally or vertically |
Easy
|
microsoft
|
|
| Break a string into lines of length k without breaking words |
Medium
|
amazon
|
|
| Expected number of rounds to reach one remaining coin |
Easy
|
microsoft
|
|
| 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
|
|
| Find all starting indices of anagrams of a word in a string |
Hard
|
|
|
| Count Vowel Strings in Ranges |
Medium
|
|
|
| Best Sightseeing Pair |
Medium
|
wayfair
|
|
| Find Largest Value in Each Tree Row Problem |
Medium
|
amazon
apple
facebook
linkedin
microsoft
|
|
| Check if doubly linked list is palindrome |
Easy
|
google
|
|
| Shortest substring containing all characters in a set |
Medium
|
square
|
|
| Return two prime numbers that sum to a given even number |
Easy
|
alibaba
|
|
| Find Minimum Diameter After Merging Two Trees |
Hard
|
|
|
| Minimum Number of Operations to Sort a Binary Tree by Level |
Medium
|
|
|
| Maximum Number of K-Divisible Components |
Hard
|
|
|
| Reverse Odd Levels of Binary Tree Problem |
Medium
|
|
|
| Final Prices With a Special Discount in a Shop |
Easy
|
|
|
| Construct String With Repeat Limit |
Medium
|
|
|
| Final Array State After K Multiplication Operations 1 Problem |
Easy
|
|
|
| Maximum Average Pass Ratio |
Medium
|
|
|
| Continuous Subarrays |
Medium
|
|
|
| Find Score of an Array After Marking All Elements |
Medium
|
|
|
| Take Gifts From the Richest Pile |
Easy
|
|
|
| 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 2 |
Medium
|
|
|
| Minimum Limit of Balls in a Bag |
Medium
|
|
|
| Maximum Number of Integers to Choose From a Range 1 |
Medium
|
|
|
| Move Pieces to Obtain a String Problem |
Medium
|
|
|
| Alien Dictionary |
Hard
|
airbnb
amazon
apple
bloomberg
cohesity
doordash
facebook
flipkart
google
microsoft
pinterest
pocket-gems
snapchat
square
twitter
uber
vmware
|
|
| Amount of New Area Painted Each Day |
Hard
|
|
|
| Binary Search Tree BST Operations - Delete |
Medium
|
amazon
apple
bloomberg
cisco
facebook
google
linkedin
microsoft
oracle
uber
yahoo
|
|
| Binary Search Tree BST Operations - Insert |
Medium
|
amazon
atlassian
facebook
google
microsoft
|
|
| Binary Tree Pruning |
Medium
|
amazon
buffer-box
capital-one
google
hulu
twitter
|
|
| Brace Expansion |
Medium
|
|
|
| Check if postordered array forms a binary search tree |
Medium
|
|
|
| Circular Linked List Complete Implementation |
|
|
|
| Construct Binary Search Tree BST from Preorder Traversal |
Medium
|
amazon
facebook
microsoft
oracle
|
|