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Title	Difficulty	Companies
Maximum Depth of Binary Tree	Easy	adobe amazon apple bloomberg bytedance facebook goldman-sachs google linkedin microsoft paypal sap uber yahoo
Same Tree Problem	Easy	amazon apple bloomberg facebook google linkedin microsoft
Validate Stack Sequences Problem	Medium	google linkedin
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
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
Linked List Cycle 2 - Find Start of a Cycle	Medium	adobe amazon apple ebay google linkedin microsoft netapp
Coin Change with Fewest Number of Coins Given Infinite Supply	Medium	adobe affirm airbnb amazon apple blackrock bloomberg bytedance capital-one ebay facebook goldman-sachs google jpmorgan linkedin microsoft oracle paypal sap uber visa vmware yahoo zappos
House Robber 1	Medium	adobe airbnb amazon apple bloomberg bytedance cisco ebay expedia goldman-sachs google hbo linkedin microsoft quora uber
Two Sum	Easy	adobe aetion affirm airbnb alibaba amazon apple audible baidu blackrock bloomberg bookingcom box bytedance cisco citadel cloudera deutsche-bank didi drawbridge dropbox ebay emc expedia facebook factset ge-digital godaddy goldman-sachs google groupon huawei ibm indeed intel intuit jpmorgan linkedin lyft mathworks microsoft morgan-stanley netease nvidia oracle paypal qualcomm quora radius roblox salesforce samsung sap servicenow snapchat splunk spotify tableau tencent twilio twitter uber valve visa vmware wish works-applications yahoo yandex yelp zillow zoho
Maximum Product Subarray	Medium	adobe akuna-capital alibaba amazon bloomberg bytedance facebook google linkedin microsoft oracle uber
Product of Array Except Self	Medium	adobe amazon apple asana blackrock bloomberg bytedance ebay evernote facebook goldman-sachs google grab groupon intel linkedin lyft microsoft nutanix oracle paypal qualtrics salesforce sap servicenow snapchat splunk tableau uber visa vmware yahoo
Number of Islands	Medium	adobe affirm alibaba amazon appdynamics apple arista-networks atlassian audible blackrock bloomberg bytedance cisco citadel citrix cohesity cruise-automation doordash ebay electronic-arts evernote expedia facebook godaddy goldman-sachs google houzz hulu jpmorgan linkedin liveramp lyft mathworks microsoft nutanix nvidia oracle palantir-technologies paypal qualtrics roblox salesforce servicenow snapchat splunk spotify square sumologic tableau twitch twitter uber visa vmware wish yahoo zenefits zulily
Reorder List such that i-th element points to n-i th element	Medium	adobe amazon apple bytedance cisco ebay facebook google linkedin microsoft splunk tencent
Path Sum 2 - find all root to leaf paths	Medium	adobe amazon apple baidu bloomberg bytedance facebook google linkedin microsoft oracle quora vmware zillow
Edit Distance Problem	Medium	adobe amazon apple baidu bloomberg bytedance facebook goldman-sachs google intuit linkedin microsoft paypal qualcomm square uber vmware yahoo
Text Justification	Hard	airbnb amazon apple box coursera facebook google indeed intuit linkedin lyft microsoft palantir paypal pinterest robinhood snapchat twilio twitter uber
Rotate Linked List to Right	Medium	adobe amazon bloomberg facebook linkedin microsoft
Merge Overlapping Intervals	Medium	adobe alibaba amazon apple atlassian bloomberg bytedance cisco cohesity coupang cruise-automation dataminr doordash ebay facebook godaddy goldman-sachs google intuit linkedin microsoft netflix oracle palantir-technologies paypal pinterest postmates salesforce sap servicenow snapchat sumologic tencent twitch twitter two-sigma uber visa vmware wayfair wish yahoo yandex yelp zulily
Combination Sum 2 - Cant Reuse same element	Medium	adobe amazon apple bloomberg ebay facebook google linkedin microsoft nutanix snapchat uber
Combination Sum 1 Problem	Medium	airbnb akuna-capital amazon apple bloomberg ebay facebook goldman-sachs google jpmorgan linkedin microsoft quora snapchat square uber vmware yelp
Find first and last positions of target element in sorted array	Medium	airbnb amazon apple bloomberg bytedance facebook google linkedin microsoft netflix oracle qualtrics quip uber visa yahoo yandex
Search in Rotated Sorted Array	Medium	adobe alibaba amazon apple baidu bloomberg bytedance cisco ebay expedia facebook goldman-sachs google ixl jpmorgan linkedin microsoft netease nutanix nvidia oracle paypal salesforce samsung snapchat tencent tesla tripadvisor twitch uber visa vmware yahoo yandex zillow zulily
LFU Cache Problem	Hard	adobe alibaba amazon apple bloomberg goldman-sachs google linkedin microsoft salesforce snapchat uber vmware
Design LRU Cache	Medium	adobe alibaba amazon apple asana baidu bloomberg bytedance cisco citadel cloudera cruise-automation docusign doordash dropbox ebay expedia facebook godaddy goldman-sachs google groupon hbo intuit jpmorgan linkedin lyft microsoft morgan-stanley nutanix nvidia oracle palantir-technologies paypal pinterest roblox salesforce sap snapchat splunk spotify tesla tripadvisor twilio twitch twitter two-sigma uber visa vmware wish yahoo yandex zenefits zillow
Insert Interval	Medium	adobe amazon apple dataminr facebook google linkedin microsoft oracle tableau twitter uber
Symmetric Binary Tree Problem	Easy	adobe alibaba amazon apple atlassian audible bloomberg facebook google linkedin microsoft oracle salesforce sap tripadvisor twitter uber visa vmware yandex
Best Time To Buy And Sell Stock 1 - only one transaction	Easy	adobe akuna-capital alibaba amazon apple atlassian audible blackrock bloomberg bytedance cisco citadel deutsche-bank doordash expedia facebook goldman-sachs google grab groupon intel jpmorgan linkedin lyft microsoft morgan-stanley oracle paypal redfin sap snapchat tableau tencent uber visa vmware yahoo zillow
Merge Two Sorted Arrays	Easy	adobe amazon apple baidu bloomberg bytedance cisco ebay expedia facebook goldman-sachs google ibm indeed linkedin lyft microsoft netflix oracle quip tableau uber vmware yahoo yandex
Valid Palindrome Problem	Easy	adobe amazon apple bloomberg cisco ebay facebook google linkedin microsoft oracle spotify uber wayfair wish yandex zenefits
Permutations of Array 1	Medium	adobe amazon apple atlassian bloomberg bytedance cisco ebay facebook garena godaddy goldman-sachs google linkedin microsoft netease oracle paypal salesforce sap uber vmware yahoo
Integer To Roman Problem	Medium	adobe amazon apple blackrock bloomberg evernote facebook google linkedin microsoft opendoor oracle paypal salesforce twitter yahoo
Roman To Integer Problem	Easy	adobe amazon apple bloomberg facebook goldman-sachs google linkedin microsoft oracle qualtrics uber yahoo zillow
Binary Search Tree BST Inorder Iterator	Medium	alibaba amazon apple atlassian bloomberg bytedance cisco cloudera ebay facebook google linkedin microsoft oracle qualtrics redfin splunk uber
Two Sum 3 - Data structure design	Easy	linkedin
Can Place Flowers Problem	Easy	amazon cisco facebook google linkedin yahoo
Isomorphic Strings Problem	Easy	adobe amazon bloomberg facebook google linkedin microsoft oracle salesforce yahoo yelp
Min Stack Problem	Medium	adobe amazon apple bloomberg ebay facebook flipkart goldman-sachs google groupon intuit linkedin lyft microsoft morgan-stanley netflix oracle pure-storage servicenow snapchat uber visa wish zenefits
First Unique Character in a String	Easy	adobe amazon apple bloomberg facebook goldman-sachs google huawei jpmorgan linkedin microsoft servicenow yahoo zillow zulily
Integer to English Words Problem	Hard	amazon apple barclays bloomberg capital-one citrix facebook google jpmorgan linkedin microsoft nutanix oracle palantir-technologies paypal sap splunk square tableau tesla uber visa yahoo yelp zillow
Fizz Buzz Problem	Easy	adobe amazon apple bloomberg capital-one cisco google linkedin microsoft oracle salesforce spotify wayfair
Paint House 1 - N houses with 3 colors with no two adjacent houses with same color	Medium	apple linkedin microsoft tencent twitter
Design HashMap Problem	Easy	adobe amazon apple atlassian dell facebook goldman-sachs google linkedin microsoft nvidia oracle reddit salesforce servicenow tableau twitter uber vmware
Word Search 1 - Find if word exists	Medium	adobe amazon apple bloomberg bytedance coupang coursera cruise-automation docusign facebook google intuit jpmorgan linkedin lyft microsoft oracle pinterest quantcast snapchat uber vmware yahoo zillow
Top K Frequent Words Problem	Medium	adobe amazon apple atlassian bloomberg expedia facebook google linkedin microsoft oracle pocket-gems salesforce tripadvisor uber vmware yelp
Serialize and Deserialize N-Ary Tree	Hard	amazon apple ebay facebook google linkedin microsoft pinterest uber
Rotate String Problem	Easy	amazon apple ebay linkedin microsoft oracle google
Find smallest letter greater than target in a sorted array of letters	Easy	linkedin