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21 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
Find the Index of the First Occurrence in a Stringeasy-
adobeamazonapple
Regular Expression Matchinghard-
adobeairbnbalibaba
First Missing Positivehard-
adobeamazonapple
Dutch National Flag DNFmedium
amazonapplebloomberg
Clone Undirected Graphmedium
amazonapplefacebook
Word Break 1 - Check if word is breakablemedium
adobeamazonapple
Shortest Palindrome 1 - Prepending charactershard-
adobeamazonbloomberg
Kth Largest Element in an Arraymedium-
adobeairbnbalibaba
Alien Dictionaryhard-
airbnbamazonapple
Inorder Successor in Binary Search Treemedium-
amazonbloombergcitadel
Top K Frequent Elementsmedium
amazonapplebloomberg
Find Leaves of Binary Treemedium-
amazonatlassianebay
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
adobeaffirmamazon
Longest Substring with Same Letters after Replacementmedium
bloomberggooglepocket-gems
Find All Duplicates in an Arraymedium-
amazonapplebloomberg
Number of Provincesmedium-
adobeamazonatlassian
Non-negative Integers without Consecutive Oneshard-
pocket-gems
Top K Frequent Wordsmedium-
adobeamazonapple
Delete and Earnmedium-
akuna-capitalpocket-gemsuber
Basic Calculator 3hard-
amazonapplebytedance
Pairs of Songs With Total Durations Divisible by 60medium-
adobeamazoncitrix