All Problems

27 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
Two Sumeasy
adobeaetionaffirm
Median of Two Sorted Arrayshard-
adobeairbnbalibaba
Longest Palindromic Substringmedium
adobeairbnbalibaba
Convert String to Integer atoimedium-
adobeamazonapple
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Search in Rotated Sorted Arraymedium
adobealibabaamazon
Merge Overlapping Intervalsmedium
adobealibabaamazon
Minimum Window Substringhard
adobeairbnbamazon
Best Time To Buy And Sell Stock 1 - only one transactioneasy
adobeakuna-capitalalibaba
Single Number 1 - All elements except one occur twiceeasy
adobeairbnbamazon
Reorder List such that i-th element points to n-i-th elementmedium
adobeamazonapple
Intersection of Two Linked Listseasy-
airbnbalibabaamazon
Majority Element - Boyer–Moore majority vote algorithmeasy-
adobeamazonapple
Reverse Bitseasy
airbnbamazonapple
Reverse Linked Listeasy
adobealibabaamazon
Kth Largest Element in an Arraymedium-
adobeairbnbalibaba
Basic Calculator 2 Problemmedium-
airbnbamazonapple
Search a 2D Matrix 2 - Rows and columns are sortedmedium-
adobeamazonapple
Paint House 1 - N houses with 3 colors with no two adjacent houses with same color colormedium-
applelinkedinmicrosoft
Find Duplicate Number in array containing n+1 numbers between 1 and nmedium-
adobeamazonapple
Decode Stringmedium-
alibabaamazonappdynamics
Diameter Of a Binary Treeeasy-
adobeamazonapple
Remove Boxeshard-
appletencent
Minimum Factorizationmedium-
tencent
Longest Common Subsequence LCS 1 - Get Lengthmedium
amazonbytedancefacebook