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35 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
Find the Index of the First Occurrence in a String	easy	-	adobe amazon apple
Reverse Integer	medium	-	adobe amazon apple
Next Permutation	medium	-	adobe amazon apple
Longest Valid Parentheses	hard	-	adobe amazon apple
Valid Sudoku	medium		adobe amazon apple
Sudoku Solver	hard	-	adobe amazon apple
Jump Game 2 - Get min jumps	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Permutations of Array 2 - Array has duplicates	medium	-	adobe amazon apple
Spiral Matrix 1 - Return	medium		adobe amazon apple
Valid Number	hard	-	adobe amazon apple
Search a 2D Matrix 1 - Elements sorted row-wise and first integer of each row is greater than last element of previous row is greater than last element of previous row	medium	-	adobe amazon apple
Search in Rotated Sorted Array 2 - Check if number exists - Duplicates allowed	medium	-	adobe amazon bloomberg
Largest Rectangle in Histogram	hard	-	adobe amazon bloomberg
Unique BSTs 2 - Generate	medium	-	adobe amazon apple
Distinct Subsequences	hard	-	adobe amazon barclays
Best Time To Buy And Sell Stock 1 - only one transaction	easy		adobe akuna-capital alibaba
Binary Tree Path Sum - Maximum between any two nodes	hard		adobe amazon appdynamics
Excel Sheet Column Title	easy	-	adobe apple facebook
Number of 1 Bits	easy		adobe amazon apple
Count Primes	medium	-	adobe amazon apple
Shortest Palindrome 1 - Prepending characters	hard	-	adobe amazon bloomberg
Contains Duplicate 2 - within k distance	easy	-	adobe airbnb amazon
Contains Duplicate 3 - within k distance and t difference	hard	-	adobe airbnb apple
Binary Tree Path - All root to leaf paths	easy	-	adobe amazon apple
Find Duplicate Number in array containing n+1 numbers between 1 and n	medium	-	adobe amazon apple
Find Median from Data Stream	hard		adobe amazon apple
Integer Break	medium	-	adobe apple google
Lexicographical Numbers	medium		adobe bloomberg bytedance
Find the Difference	easy	-	adobe amazon google
Remove K Digits	medium	-	adobe amazon bloomberg
Split Linked List in Parts	medium		adobe amazon
Cherry Pickup	hard	-	adobe akuna-capital amazon
Cousins in Binary Tree	easy	-	adobe amazon bloomberg
Shuffle the Array	easy	-	adobe microsoft