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134 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)

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Title	Difficulty	Videos	Companies
Divide Two Integers	medium	-	adobe amazon apple
Add Two Numbers represented as Linked List in Reversed Order	medium	-	adobe aetion airbnb
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Longest Palindromic Substring	medium		adobe airbnb alibaba
Reverse Integer	medium	-	adobe amazon apple
Convert String to Integer atoi	medium	-	adobe amazon apple
Container With Most Water	medium		adobe amazon apple
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
Remove Nth Node From End of List	medium		adobe amazon apple
Swap Nodes in Pairs	medium	-	adobe amazon apple
Search in Rotated Sorted Array	medium		adobe alibaba amazon
Find first and last positions of target element in sorted array	medium	-	airbnb amazon apple
Valid Sudoku	medium		adobe amazon apple
Count and Say Sequence	medium	-	adobe amazon apple
Multiply Strings	medium	-	amazon apple expedia
Jump Game 2 - Get min jumps	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Group Anagrams	medium		adobe affirm amazon
Implement Power Function 1	medium	-	adobe amazon apple
Maximum Subarray Sum	medium		adobe alibaba amazon
Spiral Matrix 1 - Return	medium		adobe amazon apple
Jump Game 1 - Check if it reaches last index	medium		adobe amazon apple
Merge Overlapping Intervals	medium		adobe alibaba amazon
Insert Interval	medium		adobe amazon apple
Spiral Matrix 2 - Generate	medium		adobe amazon apple
Unique Paths in Grid 1 - Count all paths moving right or down	medium		adobe alibaba amazon
Simplify Path	medium	-	adobe amazon bloomberg
Set Matrix Zeros	medium		adobe amazon apple
Dutch National Flag DNF	medium		amazon apple bloomberg
Word Search 1 - Find if word exists	medium		adobe amazon apple
Decode Ways	medium		adobe amazon apple
Reverse Linked List 2 - between m and n	medium	-	adobe amazon apple
Validate Binary Search Tree	medium		adobe amazon apple
Binary Tree Level Order Traversal - Level by Level	medium		adobe amazon apple
Binary Tree Traversal - Zigzag Level Order Traversal	medium	-	amazon apple bloomberg
Construct Binary Tree from Inorder and Preorder Traversal	medium		adobe amazon apple
Binary Tree Traversal - Level Order Bottom up	medium	-	adobe amazon apple
Convert Sorted List into a height-balanced Binary search Tree	medium	-	amazon bloomberg facebook
Path Sum 2 - find all root to leaf paths	medium	-	adobe amazon apple
Flatten binary tree to linked list in order of preorder traversal	medium	-	adobe amazon apple
Populate next pointer to right node in Perfect Binary Tree	medium	-	amazon apple bloomberg
Populate next pointer to right node in Binary Tree	medium	-	amazon bloomberg facebook
Best Time To Buy And Sell Stock 2 - Any number of times	medium	-	adobe amazon apple
Longest Consecutive Sequence	medium		adobe amazon apple
Copy List with Random Pointer	medium	-	adobe amazon apple
Word Break 1 - Check if word is breakable	medium		adobe amazon apple
Design LRU Cache	medium	-	adobe alibaba amazon
Evaluate Reverse Polish Notation	medium	-	amazon atlassian facebook

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