| 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 | | |
| Binary Tree Pruning | Medium | amazon
capital-one
google
hulu
twitter
buffer-box | |
| Circular Linked List Complete Implementation | | | |
| Construct Binary Search Tree BST from Preorder Traversal | Medium | amazon
facebook
microsoft
oracle | |
| Convert a sorted doubly linked list DLL to balanced binary search tree | | | |
| Convert a sorted doubly linked list DLL to balanced binary search tree in-place | | | |
| Implement queue using linked list | | | |
| Implementing a queue using a fixed-size array | | | |
| K closest Points to Origin | Medium | amazon
apple
asana
ebay
expedia
facebook
goldman-sachs
google
linkedin
microsoft
oracle
paypal
uber
visa
yahoo | |
| Min Queue Problem | Easy | | |
| Nodes at Distance k from Leaf Nodes in Binary Tree | | | |
| Nodes at Distance k from root in Binary Tree | | | |
| Plus One 2 - Given number as Linked List plus one | Medium | amazon
google | |
| Range Sum Query - Immutable | Easy | amazon
bloomberg
facebook
google
microsoft
palantir-technologies
goldman-sachs | |
| Adding Spaces to a String | Medium | | |
| Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree | Medium | amazon | |
| Debounce | Medium | facebook | |
| Design an Ordered Stream Problem | Easy | | |
| Find Building Where Alice and Bob Can Meet | Hard | | |
| Minimum Time to Visit a Cell In a Grid | Hard | | |
| Valid Palindrome 3 - Is string palindrome after deleting at most k chars | Hard | facebook
google | |
| Check If a Word Occurs As a Prefix of Any Word in a Sentence Problem | Easy | yelp | |
| Interval List Intersections | Medium | amazon
apple
bloomberg
cruise-automation
doordash
facebook
google
oracle
pinterest
snapchat
uber | |
| Make String a Subsequence Using Cyclic Increments | Medium | | |
| Maximum Score After Splitting a String | Easy | google | |
| Minimum Obstacle Removal to Reach Corner | Hard | | |
| Partition Array According to Given Pivot | Medium | amazon | |
| Special Array 1 | Easy | | |
| Valid Arrangement of Pairs | Hard | | |
| Valid Palindrome 4 - is string palindrome after at most 2 char replacement | Medium | | |
| Shortest Distance After Road Addition Queries I | Medium | | |
| Binary Tree Path Sum - Maximum Sum Leaf to Root path | | | |
| Binary Tree Path Sum - Maximum Sum Root to Leaf path | | | |
| Binary Tree Path Sum - Minimum Sum Root to Leaf path | Easy | apple | |
| Check if tree is full binary tree | | | |
| Implement queue using resizing array | | | |
| Minimum Number Of Platforms For Train Station | | | |
| Robot Room Cleaner | Hard | amazon
facebook
google
microsoft | |
| Target Sum Problem | Medium | facebook
google
microsoft | |
| Binary Tree Path - All root to leaf paths | Easy | adobe
amazon
apple
facebook
google
microsoft | |
| Maximum CPU Load For Running Tasks | | | |
| Find Champion II | Medium | | |
| Sliding Puzzle Problem | Hard | airbnb
amazon
facebook
google
microsoft
uber | |
| Maximum Matrix Sum Problem | Medium | | |
| Implement circular stack | | | |
| Rotating the Box Problem | Medium | | |
| Flip Columns For Maximum Number of Equal Rows Problem | Medium | | |