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Title	Difficulty	Companies
First Missing Positive Problem	Hard	adobe amazon apple bloomberg bytedance databricks ebay facebook google grab inmobi microsoft model-N morgan-stanley oracle pocket-gems salesforce sap stripe tesla twitch uber vmware wayfair wish
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
Add Binary Strings	Easy	adobe amazon apple facebook google microsoft oracle
3Sum - Closest	Medium	adobe amazon apple bloomberg facebook goldman-sachs google microsoft sap uber vmware yandex
Non-decreasing Array Problem	Medium	adobe amazon ebay facebook google
Valid Tic-Tac-Toe State Problem	Medium	amazon facebook google microsoft oracle
Increasing Triplet Subsequence	Medium	amazon bloomberg facebook google uber yahoo
Reverse Vowels of a String	Easy	amazon apple facebook google
Summary Ranges	Easy	amazon bloomberg capital-one facebook google indeed microsoft uber yandex
Game of Life Problem	Medium	amazon bloomberg dropbox facebook goldman-sachs google microsoft opendoor oracle reddit snapchat two-sigma uber zillow
Split Array Largest Sum Problem	Hard	amazon baidu facebook google
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
Cheapest Flights Within K Stops Problem	Medium	airbnb amazon bloomberg ebay facebook google microsoft
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
Single Number 1 - All elements except one occur twice	Easy	adobe airbnb amazon apple atlassian bloomberg facebook google microsoft oracle palantir-technologies tencent
Reverse String	Easy	adobe amazon apple bloomberg cisco ebay facebook godaddy goldman-sachs google microsoft oracle paypal servicenow snapchat uber
Remove duplicates from Sorted List 1	Easy	adobe amazon apple bytedance ebay facebook google microsoft salesforce
2Sum 2 – Input array is sorted	Medium	amazon apple bloomberg bytedance expedia facebook goldman-sachs google microsoft paypal pure-storage
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
Move Zeroes at the end of array	Easy	adobe amazon apple bloomberg cohesity dell ebay facebook goldman-sachs google lyft microsoft nutanix oracle paypal qualcomm sap tesla uber yahoo yandex zillow
Squares of a Sorted array Problem	Easy	adobe amazon apple bloomberg bytedance ebay electronic-arts facebook google jane-street microsoft nutanix oracle paypal splunk twitch uber vmware
Valid Palindrome Problem	Easy	adobe amazon apple bloomberg cisco ebay facebook google linkedin microsoft oracle spotify uber wayfair wish yandex zenefits
Remove duplicates from Sorted Array 1	Easy	adobe amazon apple bloomberg cisco cohesity ebay facebook google hulu microsoft oracle servicenow uber vmware
Reverse Linked List Problem	Easy	adobe alibaba amazon apple bloomberg bytedance cisco citrix docusign ebay electronic-arts facebook factset goldman-sachs google intel mathworks microsoft nvidia oracle paypal qualcomm snapchat spotify tencent tripadvisor twitter uber visa vmware yahoo yandex yelp 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
Word Pattern 1 Problem	Easy	amazon capital-one dropbox facebook google microsoft uber
Evaluation function for Tic-Tac-Toe	Easy	amazon apple facebook zoho
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
String Compression Problem	Medium	akuna-capital amazon apple bloomberg ebay expedia facebook godaddy goldman-sachs google lyft microsoft redfin snapchat spotify wayfair yandex yelp zillow
Remove Nth Node From End of List	Medium	adobe amazon apple bloomberg bytedance cisco facebook goldman-sachs google microsoft oracle vmware yandex
Valid Anagram Problem	Easy	amazon apple bloomberg cisco docusign expedia facebook goldman-sachs google microsoft morgan-stanley oracle paypal servicenow snapchat uber yahoo yelp zulily
Letter Combinations of a Phone Number Problem	Medium	amazon apple atlassian bloomberg cisco dropbox ebay facebook goldman-sachs google jpmorgan lyft microsoft morgan-stanley nutanix oracle quip roblox salesforce servicenow square twilio uber vmware yahoo yelp
4Sum	Medium	adobe amazon apple bloomberg facebook google microsoft samsung yahoo
Regular Expression Matching Problem	Hard	adobe airbnb alibaba amazon apple bloomberg bytedance coursera databricks ebay facebook flipkart google houzz lyft microsoft oracle palantir-technologies pocket-gems twitter uber zulily
Wildcard Matching Problem	Hard	adobe amazon bloomberg bytedance coursera cruise-automation facebook goldman-sachs google microsoft oracle snapchat twitter two-sigma
Add Two Numbers represented as Linked List in Reversed Order	Medium	adobe aetion airbnb alibaba amazon apple baidu bloomberg bytedance capital-one cisco dell docusign ebay facebook flipkart google grab huawei ibm intel lyft mathworks microsoft nvidia oracle paypal qualcomm redfin salesforce servicenow uber vmware wish yahoo yandex zoho
UTF-8 Validation	Medium	amazon apple facebook google palantir-technologies
Two Sum 4 - Input is Binary Search Tree	Easy	amazon facebook microsoft samsung servicenow snapchat google
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
Number of Subsequences That Satisfy the Given Sum Condition	Medium	facebook google
Word Pattern 2 Problem	Medium	dropbox facebook pony-ai ponyai uber
Shift 2D Grid	Easy	amazon facebook
Next Greater Element 1	Easy	amazon bloomberg facebook google microsoft oracle twitter
Single Number 3 - All elements except two occur twice	Medium	amazon apple facebook yahoo
Find Pivot Index	Easy	amazon apple bloomberg citadel coupang expedia facebook godaddy goldman-sachs google indeed microsoft radius salesforce tesla