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Array (176)Sorting (46)Depth First Search (44)Tree (41)Breadth First Search (35)Stack (29)Linked List (28)Recursion (18)Graph Theory (12)Monotonic Stack (10)Queue (7)Shortest Path (2)

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Title	Difficulty	Videos	Companies
Kaprekar's Constant Calculator	medium	-	salesforce
Add Two Numbers represented as Linked List in Reversed Order	medium	-	adobe aetion airbnb
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Integer To Roman	medium	-	adobe amazon apple
3Sum0 - Find three elements in an array that sum to a zero	medium		adobe akuna-capital alibaba
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
Generate Parentheses	medium	-	adobe alibaba amazon
Search in Rotated Sorted Array	medium		adobe alibaba amazon
Valid Sudoku	medium		adobe amazon apple
Rotate n x n matrix by 90 degrees	medium		adobe akuna-capital amazon
Permutations of Array 1	medium	-	adobe amazon apple
Group Anagrams	medium		adobe affirm amazon
Maximum Subarray Sum	medium		adobe alibaba amazon
Merge Overlapping Intervals	medium		adobe alibaba amazon
Simplify Path	medium	-	adobe amazon bloomberg
Set Matrix Zeros	medium		adobe amazon apple
Remove duplicates from Sorted List 2	medium		adobe amazon apple
Validate Binary Search Tree	medium		adobe amazon apple
Word Break 1 - Check if word is breakable	medium		adobe amazon apple
Design LRU Cache	medium	-	adobe alibaba amazon
Reverse Words in a String	medium	-	amazon apple bloomberg
Find Minimum in Rotated Sorted Array	medium		amazon apple bloomberg
Largest Number From Given Numbers	medium		amazon apple bytedance
Number of Islands	medium		adobe affirm alibaba
Course Schedule 1 - Is it Possible	medium		amazon apple bloomberg
Design Add and Search Words Data Structure	medium		airbnb amazon apple
Kth Largest Element in an Array	medium		adobe airbnb alibaba
Lowest Common Ancestor of a Binary Tree	medium		adobe airbnb amazon
Product of Array Except Self	medium		adobe amazon apple
Search a 2D Matrix 2 - Rows and columns are sorted	medium	-	adobe amazon apple
Flatten 2D Vector	medium	-	airbnb apple facebook
Graph Valid Tree	medium		amazon facebook google
Find Duplicate Number in array containing n+1 numbers between 1 and n	medium	-	adobe amazon apple
Longest Increasing Subsequence	medium		adobe amazon apple
Binary Tree Traversal - Vertical Order Traversal	medium	-	adobe amazon bloomberg
Design Tic-Tac-Toe	medium	-	amazon apple bloomberg
Design Snake Game	medium	-	amazon apple bloomberg
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowed	medium	-	adobe affirm amazon
Shuffle an Array	medium	-	amazon apple bloomberg
Decode String	medium	-	alibaba amazon appdynamics
K-diff Pairs in an Array	medium	-	amazon bloomberg goldman-sachs
Number of Provinces	medium	-	adobe amazon atlassian
Top K Frequent Words	medium	-	adobe amazon apple
Find the Smallest Divisor Given a Threshold	medium	-	bytedance expedia salesforce

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