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119 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

All Topics(4301)Bash(0)Database(0)Java(0)Javascript(0)Networking(0)Object Oriented Design(1)Programming Languages(0)SQL(0)System Design(0)Algorithms(522)

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Title	Difficulty	Videos	Companies
Count Inversions - Count Smaller on Right	medium	-	google
First Unique Character in a Stream of Characters	medium	-	amazon google microsoft
Reverse Integer	medium	-	adobe amazon apple
Find the Index of the First Occurrence in a String	easy	-	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
Combination Sum 1	medium		airbnb akuna-capital amazon
Jump Game 2 - Get min jumps	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Spiral Matrix 1 - Return	medium		adobe amazon apple
Kth Permutation Sequence of Numbers 1 to N	hard	-	amazon apple facebook
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
Scramble String	hard	-	apple google
Construct Binary Tree from Inorder and Postorder Traversal	medium	-	amazon bloomberg facebook
Convert Sorted List into a height-balanced Binary search Tree	medium	-	amazon bloomberg facebook
Distinct Subsequences	hard	-	adobe amazon barclays
Populate next pointer to right node in Binary Tree	medium	-	amazon bloomberg facebook
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
Palindrome Partitioning II	hard	-	amazon google
Surrounded Regions	medium	-	amazon ebay facebook
Insertion Sort on List	medium	-	bloomberg google microsoft
Binary Tree Upside Down	medium	-	google linkedin
Friend Words - One Edit Distance	medium	-	amazon facebook google
Fraction to Recurring Decimal	medium	-	airbnb amazon apple
Excel Sheet Column Title	easy	-	adobe apple facebook
Excel Sheet Column Number	easy	-	amazon apple bloomberg
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
Different Ways to Add Parentheses	medium	-	amazon cisco citadel
Flatten 2D Vector	medium	-	airbnb apple facebook
Binary Tree Path - All root to leaf paths	easy	-	adobe amazon apple
3Sum Smaller	medium	-	google ibm mathworks
Generate nth ugly number	medium	-	amazon oracle uber
Zigzag Iterator	medium	-	amazon apple cruise-automation
Peeking Iterator	medium	-	amazon apple atlassian
Find Duplicate Number in array containing n+1 numbers between 1 and n	medium	-	adobe amazon apple
Flip Game 1	easy	-	google
Flip Game 2	medium	-	google
Find Median from Data Stream	hard		adobe amazon apple
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Remove Invalid Parentheses Problem	hard	-	amazon apple bloomberg

Showing 1 to 50 of 119 results