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#	Problem	Companies
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1	Remove Outermost Parentheses	A A G A Remove Outermost Parentheses · 3 Companies A Amazon A Apple G Google
2	Valid Anagram	A A A B A Valid Anagram · 8 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google M Microsoft U Uber
3	Valid Palindrome	A A A B A Valid Palindrome · 10 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google M Microsoft S Spotify U Uber Y Yahoo
4	Valid Palindrome II	A A B B A Valid Palindrome II · 8 Companies A Amazon A Apple B Bloomberg B ByteDance F Facebook G Google LinkedIn M Microsoft
5	Reverse String	A A A B A Reverse String · 8 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft
6	Find the Index of the First Occurrence in a String	A A A B A Find the Index of the First Occurrence in a String · 8 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft
7	Longest Common Prefix	A A A B A Longest Common Prefix · 8 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft
8	First Unique Character in a String	A A A B A First Unique Character in a String · 10 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Goldman Sachs G Google LinkedIn M Microsoft U Uber
9	Backspace String Compare	A A B F A Backspace String Compare · 8 Companies A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft U Uber
10	Roman to Integer	A A A B A Roman to Integer · 10 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Goldman Sachs G Google M Microsoft O Oracle U Uber
11	Count Binary Substrings	A A F G A Count Binary Substrings · 4 Companies A Amazon A Apple F Facebook G Google
12	Isomorphic Strings	A A A B A Isomorphic Strings · 9 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft U Uber
13	Detect Capital	A A G A Detect Capital · 3 Companies A Amazon A Apple G Google
14	Longest Happy Prefix	A B G A Longest Happy Prefix · 3 Companies A Apple B ByteDance G Google
15	Alien Dictionary	A A F G A Alien Dictionary · 7 Companies A Airbnb A Amazon F Facebook G Google M Microsoft P Pocket Gems S Snapchat
16	Integer to English Words	A A A B A Integer to English Words · 8 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google M Microsoft U Uber
17	Count Palindromic Subsequences	A B G M A Count Palindromic Subsequences · 4 Companies A Amazon B Bloomberg G Google M Microsoft
18	Count and Say	A A B F A Count and Say · 6 Companies A Amazon A Apple B Bloomberg F Facebook G Google M Microsoft
19	Minimum Add to Make Parentheses Valid	A B F G A Minimum Add to Make Parentheses Valid · 5 Companies A Amazon B Bloomberg F Facebook G Google M Microsoft
20	Text Justification	A A F G A Text Justification · 6 Companies A Airbnb A Apple F Facebook G Google LinkedIn M Microsoft
21	Longest Substring Without Repeating Characters	A A A B A Longest Substring Without Repeating Characters · 11 Companies A Adobe A Amazon A Apple B Bloomberg B ByteDance F Facebook G Google LinkedIn M Meta M Microsoft U Uber
22	Sum of Beauty of All Substrings	A G M A Sum of Beauty of All Substrings · 3 Companies A Amazon G Google M Microsoft
23	Minimum Window Substring	A A A B A Minimum Window Substring · 15 Companies A Adobe A Amazon A Apple B Bloomberg B ByteDance F Facebook G Goldman Sachs G Google LinkedIn M Microsoft O Oracle S Snapchat T Twitter U Uber Y Yahoo
24	Group Anagrams	A A A B A Group Anagrams · 11 Companies A Adobe A Amazon A Apple B Bloomberg B ByteDance F Facebook G Google M Meta M Microsoft S Salesforce U Uber
25	Find All Anagrams in a String	A A A B A Find All Anagrams in a String · 10 Companies A Adobe A Amazon A Apple B Bloomberg B ByteDance F Facebook G Google LinkedIn M Microsoft U Uber
26	Reverse Words in a String	A A A B A Reverse Words in a String · 9 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft O Oracle
27	Sort Characters By Frequency	A A B B A Sort Characters By Frequency · 8 Companies A Amazon A Apple B Bloomberg B ByteDance F Facebook G Google M Microsoft U Uber
28	Determine if Two Strings Are Close	A A B G A Determine if Two Strings Are Close · 5 Companies A Amazon A Apple B Bloomberg G Google M Microsoft
29	Decode String	A A B F A Decode String · 7 Companies A Amazon A Apple B Bloomberg F Facebook G Google M Microsoft U Uber
30	String to Integer (atoi)	A A A B A String to Integer (atoi) · 10 Companies A Adobe A Amazon A Apple B Bloomberg F Facebook G Google LinkedIn M Microsoft O Oracle U Uber
31	Partition Labels	A A B F A Partition Labels · 6 Companies A Amazon A Apple B Bloomberg F Facebook G Google U Uber
32	Letter Combinations of a Phone Number	A A B B A Letter Combinations of a Phone Number · 9 Companies A Amazon A Apple B Bloomberg B ByteDance F Facebook G Google M Meta M Microsoft U Uber