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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)

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Title	Difficulty	Videos	Companies
K reverse a Linked List in alternating way	medium	-
K-th Lexicographic Permutation of a String	medium	-
Kadane's Algorithm for Maximum Subarray Sum	medium
Kaprekar's Constant Calculator	medium	-	salesforce
Karatsuba Fast Multiplication	medium	-
Karger's algorithm for Minimum Cut	hard	-
Knight's Tour	medium	-
Knuth Morris Pratt KMP Algorithm	medium	-
kSum	medium	-
m Coloring Problem	medium	-	google
Two Sum	easy		adobe aetion affirm
Add Two Numbers represented as Linked List in Reversed Order	medium	-	adobe aetion airbnb
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Median of Two Sorted Arrays	hard	-	adobe airbnb alibaba
Longest Palindromic Substring	medium		adobe airbnb alibaba
Reverse Integer	medium	-	adobe amazon apple
Convert String to Integer atoi	medium	-	adobe amazon apple
Palindrome Number	easy		adobe amazon apple
Regular Expression Matching	hard	-	adobe airbnb alibaba
Container With Most Water	medium		adobe amazon apple
Integer To Roman	medium	-	adobe amazon apple
Roman To Integer	easy		adobe amazon apple
Longest Common Prefix in array of string	easy	-	adobe alibaba amazon
3Sum0 - Find three elements in an array that sum to a zero	medium		adobe akuna-capital alibaba
3Sum - Closest	medium	-	adobe amazon apple
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
4Sum	medium	-	adobe amazon apple
Remove Nth Node From End of List	medium		adobe amazon apple
Valid Parentheses	easy		adobe airbnb akuna-capital
Merge Two Sorted Linked Lists	easy		adobe airbnb alibaba
Generate Parentheses	medium	-	adobe alibaba amazon
Kth largest element in Binary Search Tree	medium	-
Kth Largest Element Using Randomized Selection	medium	-
Kth smallest absolute difference in array	medium	-
Kth Smallest Element in an Array	medium	-
Kth Smallest Element Using Randomized Selection	medium	-
Kth Unique Character in a String	medium	-
Largest 1-Bordered Rectangle	hard	-
Largest cross in a sparse matrix – Andrey Khayrutdinov – Medium	medium	-
Largest independent subset in a tree	medium	-
Largest String With Swaps	medium	-	facebook
Largest value path in a directed graph	hard	-	google
Last digit of a sum of the first n Fibonacci numbers	easy	-
Last digit of partial sum of the (n - m) Fibonacci numbers	easy	-
Last Duplicate Character in a String	easy	-
Last Unique Character in a String	easy	-
Lazy Caterer's sequence	medium	-
Least Recently Used (LRU) Cache Replacement Algorithm	medium	-
Lee's Algorithm	medium	-
Left side view of a tree	medium	-

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