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539 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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TitleDifficultyVideosCompanies
3Sum - Classicmedium-
microsoft
Binary Tree Level Order Traversalmedium
microsoft
Check if target word exists in matrix horizontally or verticallyeasy-
microsoft
Describe and give an example of Ad-hoc, Parametric and Subtype polymorphismmedium-
microsoft
Divide array into two subsets with minimum differencehard-
microsoft
Evaluation of Arithmetic Expression Treemedium-
microsoft
Expected number of rounds to reach one remaining coineasy-
microsoft
Find All Occurrences of the Pattern in the Stringmedium-
microsoft
Find if there is a path between two vertices in a directed grapheasy-
googlefacebookamazon
Find the Index of the First Occurrence in a Stringeasy-
adobeamazonapple
Divide Two Integersmedium-
adobeamazonapple
Finding N-th Smallest Sum from Two Sorted Arraysmedium-
microsoft
First Unique Character in a Stream of Charactersmedium-
amazongooglemicrosoft
Highway Billboardmedium-
microsoftnetappyahoo
Implement 3 stacks in 1 listhard-
microsoft
Implement stack using priority queueeasy-
adobemicrosoftamazon
Two Sumeasy
adobeaetionaffirm
Add Two Numbers represented as Linked List in Reversed Ordermedium-
adobeaetionairbnb
Longest Substring Without Repeating Charactersmedium
adobealationalibaba
Median of Two Sorted Arrayshard-
adobeairbnbalibaba
Longest Palindromic Substringmedium
adobeairbnbalibaba
Reverse Integermedium-
adobeamazonapple
Convert String to Integer atoimedium-
adobeamazonapple
Palindrome Numbereasy
adobeamazonapple
Regular Expression Matchinghard-
adobeairbnbalibaba
Container With Most Watermedium
adobeamazonapple
Integer To Romanmedium-
adobeamazonapple
Roman To Integereasy
adobeamazonapple
Longest Common Prefix in array of stringeasy-
adobealibabaamazon
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
3Sum - Closestmedium-
adobeamazonapple
Letter Combinations of a Phone Numbermedium-
amazonappleatlassian
4Summedium-
adobeamazonapple
Remove Nth Node From End of Listmedium
adobeamazonapple
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Generate Parenthesesmedium-
adobealibabaamazon
Letter Tile Possibilitiesmedium
googlemicrosoft
Longest Bitonic Subsequencemedium-
microsoft
Maximum Product Cuttingmedium-
epic-systemsmicrosoftnetapp
Maximum Weight Spanning Treehard-
microsoft
Merge K Sorted Listshard
adobeairbnbalibaba
Nth Number with sum of digits as 10easy-
microsoft
Read N characters given read7easy-
microsoft
Smallest set to cover all intervalsmedium-
googlemicrosoft
Stack of platesmedium-
microsoftamazon
Swap Nodes in Pairsmedium-
adobeamazonapple
K Reverse a linked listhard-
adobeamazonapple
Remove duplicates from Sorted Array 1easy
adobeamazonapple
Remove Elementeasy
amazonbloomberggoogle
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