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34 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
Convert String to Integer atoi	medium	-	adobe amazon apple
Integer To Roman	medium	-	adobe amazon apple
Roman To Integer	easy		adobe amazon apple
Valid Parentheses	easy		adobe airbnb akuna-capital
Valid Number	hard	-	adobe amazon apple
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
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
Repeated DNA Sequences	medium	-	amazon apple google
Isomorphic Strings	easy		adobe amazon bloomberg
Shortest Word Distance 1	easy	-	amazon google linkedin
Shortest Word Distance 2	medium	-	amazon ebay linkedin
Shortest Word Distance 3	medium	-	linkedin
Integer to English Words	hard		amazon apple barclays
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
First Unique Character in a String	easy	-	adobe amazon apple
Fizz Buzz	easy	-	adobe amazon apple
Serialize and Deserialize N-Ary Tree	hard	-	amazon apple ebay
Serialize and Deserialize Binary Search Tree BST	medium	-	amazon bytedance ebay
Sort Characters By Frequency	medium	-	amazon bloomberg expedia
Longest Palindromic Subsequence 1 - Get Length	medium	-	amazon apple bloomberg
Palindromic Substrings	medium		adobe amazon apple
Top K Frequent Words	medium	-	adobe amazon apple
Accounts Merge	medium	-	amazon apple bloomberg
Count Different Palindromic Subsequences	hard	-	facebook google linkedin
Rotate String	easy	-	amazon apple ebay
Find And Replace in String	medium	-	google linkedin microsoft
Time Based Key-Value Store	medium	-	amazon apple atlassian
Vertical Order Traversal of a Binary Tree	hard	-	adobe amazon bloomberg
Recover a Tree From Preorder Traversal	hard		amazon linkedin