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134 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)Algorithms(3944)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)

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Two Sumeasy
adobeaetionaffirm
Longest Substring Without Repeating Charactersmedium
adobealationalibaba
Longest Palindromic Substringmedium
adobeairbnbalibaba
Palindrome Numbereasy
adobeamazonapple
Container With Most Watermedium
adobeamazonapple
Roman To Integereasy
adobeamazonapple
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
Remove Nth Node From End of Listmedium
adobeamazonapple
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Merge K Sorted Listshard
adobeairbnbalibaba
Remove duplicates from Sorted Array 1easy
adobeamazonapple
Remove Elementeasy
amazonbloomberggoogle
Search in Rotated Sorted Arraymedium
adobealibabaamazon
Combination Sum 1medium
airbnbakuna-capitalamazon
Rotate n x n matrix by 90 degreesmedium
adobeakuna-capitalamazon
Group Anagramsmedium
adobeaffirmamazon
Maximum Subarray Summedium
adobealibabaamazon
Spiral Matrix 1 - Returnmedium
adobeamazonapple
Jump Game 1 - Check if it reaches last indexmedium
adobeamazonapple
Merge Overlapping Intervalsmedium
adobealibabaamazon
Insert Intervalmedium
adobeamazonapple
Length of Last Wordeasy
amazon
Spiral Matrix 2 - Generatemedium
adobeamazonapple
Unique Paths in Grid 1 - Count all paths moving right or downmedium
adobealibabaamazon
Climbing Stairs - Take atmost 2 Stepseasy
adobealibabaamazon
Set Matrix Zerosmedium
adobeamazonapple
Dutch National Flag DNFmedium
amazonapplebloomberg
Minimum Window Substringhard
adobeairbnbamazon
Subsets 1medium
adobeamazonapple
Word Search 1 - Find if word existsmedium
adobeamazonapple
Remove duplicates from Sorted List 2medium
adobeamazonapple
Remove duplicates from Sorted List 1easy
adobeamazonapple
Decode Waysmedium
adobeamazonapple
Validate Binary Search Treemedium
adobeamazonapple
Same Treeeasy
amazonapplebloomberg
Binary Tree Level Order Traversal - Level by Levelmedium
adobeamazonapple
Maximum Depth of Binary Treeeasy
adobeamazonapple
Construct Binary Tree from Inorder and Preorder Traversalmedium
adobeamazonapple
Convert Sorted Array to height-balanced Binary Search Treeeasy
airbnbamazonapple
Best Time To Buy And Sell Stock 1 - only one transactioneasy
adobeakuna-capitalalibaba
Binary Tree Path Sum - Maximum between any two nodeshard
adobeamazonappdynamics
Valid Palindromeeasy
adobeamazonapple
Longest Consecutive Sequencemedium
adobeamazonapple
Palindrome Partitioningmedium
adobeamazonbloomberg
Clone Undirected Graphmedium
amazonapplefacebook
Single Number 1 - All elements except one occur twiceeasy
adobeairbnbamazon
Word Break 1 - Check if word is breakablemedium
adobeamazonapple
Word Break 2 - Construct a sentencehard
amazonappleaudible
Linked List Cycle 1 - Detect Cycleeasy
adobeamazonapple
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