Amazon

Title	Difficulty	Companies
Perfect number Problem	Easy	amazon fallible
Container With Most Water	Medium	adobe amazon apple bloomberg bytedance facebook goldman-sachs google lyft microsoft oracle uber vmware yahoo
Count Complete Tree Nodes Problem	Easy	amazon bloomberg bytedance facebook google microsoft yahoo
Longest Common Subsequence LCS 1 - Get Length	Medium	amazon bytedance facebook google indeed microsoft tencent
Lowest Common Ancestor of a Binary Tree	Medium	adobe airbnb amazon apple atlassian bloomberg bytedance ebay facebook google intuit linkedin microsoft oracle paypal pinterest salesforce splunk uber visa yahoo zillow
Pascal’s Triangle 1 - Generate first n rows	Easy	adobe amazon apple bloomberg facebook goldman-sachs google microsoft twitter uber
Skyline Problem	Hard	adobe amazon apple databricks facebook goldman-sachs google houzz microsoft salesforce tableau twitter uber yelp
Binary Tree Inorder Traversal	Easy	alibaba amazon apple bloomberg bytedance facebook google microsoft oracle sap uber
Binary Tree Postorder Traversal	Easy	adobe amazon facebook google uber
Count Univalue Subtrees Problem	Medium	amazon bloomberg box ebay facebook google
Generate Parentheses Problem	Medium	adobe alibaba amazon apple atlassian bloomberg bytedance cisco facebook google lyft microsoft nutanix nvidia salesforce samsung sap snapchat spotify uber yahoo yandex yelp zenefits
Inorder Successor in Binary Search Tree	Medium	amazon bloomberg citadel facebook google microsoft palantir-technologies pocket-gems quip zillow
Unique Paths in Grid 1 - Count all paths moving right or down	Medium	adobe alibaba amazon apple bloomberg facebook goldman-sachs google mathworks microsoft oracle snapchat uber vmware
Valid Parentheses Problem	Easy	adobe airbnb akuna-capital amazon apple atlassian audible barclays blizzard bloomberg cisco citadel doordash ebay epic-systems expedia facebook godaddy goldman-sachs google ibm intel intuit jpmorgan linkedin liveramp lyft mathworks microsoft morgan-stanley oracle paypal postmates riot-games salesforce samsung sap servicenow splunk spotify tencent tesla triplebyte twilio twitter uber visa vmware yahoo yandex zenefits zillow
Last Stone Weight Problem	Easy	amazon google
Cousins in Binary Tree Problem	Easy	adobe amazon bloomberg facebook goldman-sachs microsoft
Climbing Stairs Problem 1 - Take atmost 2 Steps	Easy	adobe alibaba amazon apple baidu bloomberg citadel facebook goldman-sachs google huawei linkedin microsoft nvidia oracle tripadvisor uber zulily
Convert Sorted Array to height-balanced Binary Search Tree	Easy	airbnb amazon apple bloomberg cisco facebook google microsoft oracle yahoo
Copy List with Random Pointer	Medium	adobe amazon apple bloomberg capital-one ebay expedia facebook google microsoft nutanix oracle qualtrics uber visa yahoo snapchat
Intersection of Two Linked Lists Problem	Easy	airbnb alibaba amazon apache-design bloomberg bytedance cisco ebay expedia facebook goldman-sachs google linkedin microsoft morgan-stanley netapp oracle qualcomm redfin sap tencent yahoo
Lowest Common Ancestor in a Binary Search Tree	Medium	adobe amazon bloomberg cisco facebook google linkedin microsoft oracle twitter uber
Maximal Square	Medium	adobe airbnb amazon appdynamics apple bloomberg citadel facebook google huawei microsoft oracle two-sigma uber vmware
Minimum Window Substring	Hard	adobe airbnb amazon apple bloomberg bytedance cohesity deutsche-bank directi ebay facebook godaddy goldman-sachs google linkedin lyft microsoft nutanix oracle salesforce snapchat tencent twitter uber visa vmware yahoo
N-Queens Problem	Hard	adobe amazon apple bytedance ebay facebook google microsoft oracle rubrik tableau uber
Diameter Of a Binary Tree	Easy	adobe amazon apple atlassian baidu bloomberg bytedance facebook google intel microsoft oracle qualtrics tencent
K Reverse a linked list	Hard	adobe amazon apple bytedance cisco cohesity ebay facebook google mathworks microsoft paypal vmware
Linked List Cycle 1 - Detect Cycle	Easy	adobe amazon apple bloomberg cisco ebay facebook goldman-sachs google linkedin microsoft oracle vmware yahoo
Maximum Depth of Binary Tree	Easy	adobe amazon apple bloomberg bytedance facebook goldman-sachs google linkedin microsoft paypal sap uber yahoo
Populate next pointer to right node in Perfect Binary Tree	Medium	amazon apple bloomberg didi facebook google microsoft nutanix oracle sap vmware
Same Tree Problem	Easy	amazon apple bloomberg facebook google linkedin microsoft
Sum of Left Leaves	Easy	adobe amazon bloomberg expedia facebook google mathworks
Binary Tree Preorder Traversal	Easy	amazon bloomberg cisco google microsoft
Best Time To Buy And Sell Stock 4 - at most k times	Hard	amazon apple bloomberg facebook google
Generate nth ugly number	Medium	amazon oracle uber
Palindrome Partitioning Problem	Medium	adobe amazon bloomberg google microsoft qualtrics uber yahoo
Boats to Save People	Medium	amazon factset google
Find duplicate number in array containing n+1 numbers between 1 and n	Medium	adobe amazon apple bloomberg ebay facebook google intuit microsoft oracle salesforce tencent vmware
Candy distribution Problem	Hard	amazon apple google microsoft salesforce uber
Binary Tree Level Order Traversal - Level by Level	Medium	adobe amazon apple atlassian bloomberg cisco citadel ebay expedia facebook google linkedin mathworks microsoft oracle sap uber vmware yahoo
Merge Two Sorted Linked Lists	Easy	adobe airbnb alibaba amazon apple arista-networks atlassian bloomberg bytedance capital-one cisco ebay facebook google huawei indeed intel linkedin lyft microsoft oracle paypal samsung tencent uber visa vmware yahoo yandex
Evaluate Reverse Polish Notation Problem	Medium	amazon atlassian facebook google linkedin microsoft opendoor oracle uber vmware yandex zillow
Reverse Words in a String	Medium	amazon apple bloomberg cisco citadel facebook google huawei microsoft nvidia oracle qualcomm salesforce snapchat vmware yelp zillow
Longest Palindromic Substring Problem	Medium	adobe airbnb alibaba amazon appdynamics apple bloomberg cisco ebay facebook godaddy google huawei jpmorgan mathworks microsoft nutanix oracle paypal pure-storage roblox samsung sap servicenow tencent uber vmware wayfair yahoo yandex
Subsets 1 Problem	Medium	adobe amazon apple atlassian bloomberg bytedance coupang ebay facebook goldman-sachs google lyft microsoft uber yahoo
Is Subsequence Problem	Easy	amazon bloomberg coursera facebook google pinterest
Convert String to Integer atoi Problem	Medium	adobe amazon apple bloomberg cisco citadel ebay facebook goldman-sachs google linkedin microsoft nvidia oracle redfin sap tencent uber vmware zillow
Majority Element 2 - With n by 3 definition	Medium	adobe amazon apple bloomberg facebook google microsoft uber zenefits
Contains Duplicate 1 - Check if array has duplicates	Easy	adobe airbnb amazon apple bloomberg facebook microsoft oracle palantir-technologies yahoo
Count the number of elements from one array less than or equal to elements in another array		amazon
Kth Smallest Element in a BST Problem	Medium	affirm amazon apple bloomberg facebook google hulu microsoft oracle triplebyte uber vmware