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Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

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Title	Difficulty	Videos	Companies
Closest leaf to root in a binary tree	medium	-
Find longest Snake sequence in a given matrix	medium	-
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Longest Palindromic Substring	medium		adobe airbnb alibaba
Longest Common Prefix in array of string	easy	-	adobe alibaba amazon
Longest arithmetic progression in a sorted array	medium	-
Longest Bitonic Subsequence	medium	-	microsoft
Longest Common Subsequence of Three Sequences	hard	-	youtube
Longest Common Substring	medium	-
Longest increasing subarray	medium	-	uber
Longest Increasing subarray with one change allowed	medium	-
Longest Palindromic Subsequence - Get Subsequence	medium	-
Longest Substring with K Distinct Characters	medium	-	google
Longest word made of other words in an array	hard	-
Manachar’s Algorithm - Longest palindromic substring in linear time	hard	-
Minimum Deletion Steps to Make a String Palindrome	medium	-
Longest Valid Parentheses	hard	-	adobe amazon apple
Longest Consecutive Sequence	medium		adobe amazon apple
Longest Increasing Subsequence	medium		adobe amazon apple
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Longest Palindromic Subsequence 1 - Get Length	medium	-	amazon apple bloomberg
Longest Common Subsequence LCS 1 - Get Length	medium		amazon bytedance facebook