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47 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)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(3944)

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Title	Difficulty	Videos	Companies
Add Two Numbers represented as Linked List in Reversed Order	medium	-	adobe aetion airbnb
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
Container With Most Water	medium		adobe amazon apple
Integer To Roman	medium	-	adobe amazon apple
Roman To Integer	easy		adobe amazon apple
3Sum - Closest	medium	-	adobe amazon apple
Generate Parentheses	medium	-	adobe alibaba amazon
Merge K Sorted Lists	hard		adobe airbnb alibaba
Substring with Concatenation of All Words	hard	-	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
First Missing Positive	hard	-	adobe amazon apple
Multiply Strings	medium	-	amazon apple expedia
Rotate n x n matrix by 90 degrees	medium		adobe akuna-capital amazon
Permutations of Array 1	medium	-	adobe amazon apple
Insert Interval	medium		adobe amazon apple
Spiral Matrix 2 - Generate	medium		adobe amazon apple
Plus One 1 - Given number as array plus one	easy	-	adobe amazon apple
Add Binary Strings	easy	-	adobe amazon apple
Square root of an integer	easy	-	amazon apple bloomberg
Set Matrix Zeros	medium		adobe amazon apple
Minimum Window Substring	hard		adobe airbnb amazon
Reverse Linked List 2 - between m and n	medium	-	adobe amazon apple
Binary Tree Inorder Traversal	easy	-	alibaba amazon apple
Unique BSTs 1 - Count	medium	-	adobe amazon apple
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
Best Time To Buy And Sell Stock 2 - Any number of times	medium	-	adobe amazon apple
Candy distribution	hard	-	amazon apple google
Linked List Cycle 1 - Detect Cycle	easy		adobe amazon apple
Linked List Cycle 2 - Find Start of a Cycle	medium	-	adobe amazon apple
Reorder List such that i-th element points to n-i-th element	medium		adobe amazon apple
Excel Sheet Column Title	easy	-	adobe apple facebook
Binary Search Tree BST Inorder Iterator	medium	-	alibaba amazon apple
Largest Number From Given Numbers	medium		amazon apple bytedance
Invert Binary Tree	easy		amazon apple bloomberg
Maximum Intervals Overlap Count	medium		amazon apple atlassian
Best Time To Buy And Sell Stock With Cooldown	medium	-	amazon apple facebook
Queue Reconstruction by Height	medium	-	amazon apple bloomberg
Diameter Of a Binary Tree	easy	-	adobe amazon apple
Maximum Product of Three Numbers	easy	-	amazon apple bloomberg
Middle of the linked list	easy		adobe amazon apple
Interval List Intersections	medium	-	amazon apple bloomberg