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89 problems total

Array (1906)Sorting (442)Depth First Search (316)Database (301)Breadth First Search (241)Tree (241)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3945)

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Title	Difficulty	Videos	Companies
Construct K Palindrome Strings	medium		uber
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Longest Palindromic Substring	medium		adobe airbnb alibaba
Convert String to Integer atoi	medium	-	adobe amazon apple
Regular Expression Matching	hard	-	adobe airbnb alibaba
Roman To Integer	easy		adobe amazon apple
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
Valid Parentheses	easy		adobe airbnb akuna-capital
Generate Parentheses	medium	-	adobe alibaba amazon
Longest Valid Parentheses	hard	-	adobe amazon apple
Multiply Strings	medium	-	amazon apple expedia
Group Anagrams	medium		adobe affirm amazon
Text Justification	hard	-	airbnb amazon apple
Edit Distance	medium	-	adobe amazon apple
Minimum Window Substring	hard		adobe airbnb amazon
Word Search 1 - Find if word exists	medium		adobe amazon apple
Decode Ways	medium		adobe amazon apple
Interleaving String	medium	-	amazon apple bloomberg
Valid Palindrome	easy		adobe amazon apple
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Word Ladder 1 - Get Ladder Length	hard	-	affirm amazon apple
Palindrome Partitioning	medium		adobe amazon bloomberg
Word Break 1 - Check if word is breakable	medium		adobe amazon apple
Word Break 2 - Construct a sentence	hard		amazon apple audible
Read N Characters Given Read4 2 - Call Multiple Times	hard	-	amazon bloomberg facebook
Friend Words - One Edit Distance	medium	-	amazon facebook google
Fraction to Recurring Decimal	medium	-	airbnb amazon apple
Excel Sheet Column Number	easy	-	amazon apple bloomberg
Largest Number From Given Numbers	medium		amazon apple bytedance
Reverse Words in a String 2	medium	-	amazon google microsoft
Implement Trie	medium		amazon apple bloomberg
Design Add and Search Words Data Structure	medium		airbnb amazon apple
Word Search 2 - Return All Words	hard		airbnb amazon apple
Basic Calculator 1	hard	-	adobe amazon bloomberg
Basic Calculator 2 Problem	medium	-	airbnb amazon apple
Valid Anagram	easy		amazon apple bloomberg
Shortest Word Distance 1	easy	-	amazon google linkedin
Shortest Word Distance 2	medium	-	amazon ebay linkedin
Group Shifted Strings	medium	-	amazon facebook google
Palindrome Permutation	easy	-	amazon apple bloomberg
Palindrome Permutation II	medium	-	amazon google microsoft
Alien Dictionary	hard		airbnb amazon apple
Integer to English Words	hard		amazon apple barclays
Expression Add Operators	hard	-	apple bytedance facebook
Word Pattern 1	easy	-	amazon capital-one dropbox
Word Pattern 2	medium	-	dropbox facebook pony-ai
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Bulls and Cows	medium	-	airbnb amazon google
Remove Invalid Parentheses Problem	hard	-	amazon apple bloomberg
Palindrome Pairs	hard	-	airbnb amazon apple

Showing 1 to 50 of 89 results