All Problems

12 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
Longest Palindromic Substringmedium
adobeairbnbalibaba
Dutch National Flag DNFmedium
amazonapplebloomberg
Min Stackmedium-
adobeamazonapple
2Sum 2 – Input array is sortedmedium
amazonapplebloomberg
Happy Numbereasy-
adobeairbnbamazon
Remove Linked List Elementseasy-
adobeamazonapple
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
adobeaffirmamazon
Valid Squaremedium-
facebookgooglepure-storage
Palindromic Substringsmedium
adobeamazonapple
Max Stackhard-
amazonbloombergfacebook
Count Different Palindromic Subsequenceshard-
facebookgooglelinkedin
Design Skiplisthard-
ebaygooglemicrosoft