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
Alice Joins Probability Student Club by Calculating Expected Values of Probabilistic Gameshard-
two-sigma
Ghost Word Game Winning Strategyhard-
two-sigma
Implement rand5() using rand7()easy-
two-sigma
Implement rand7() using rand5()medium-
two-sigma
Median of Two Sorted Arrayshard-
adobeairbnbalibaba
Stock Price Fluctuationmedium-
two-sigma
Wildcard Matchinghard-
adobeamazonbloomberg
Maximum Subarray Summedium
adobealibabaamazon
Merge Overlapping Intervalsmedium
adobealibabaamazon
Best Time To Buy And Sell Stock 3 - at most twicehard-
amazonappleatlassian
Design LRU Cachemedium-
adobealibabaamazon
Maximal Squaremedium-
adobeairbnbamazon
Game of Lifemedium-
amazonbloombergdropbox
Power of Foureasy-
two-sigma
Intersection of Two Arrays 1 - Unique Elementseasy
amazonapplebloomberg
Merge Two Sorted Iteratorsmedium-
two-sigma
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
adobeaffirmamazon
Shuffle an Arraymedium-
amazonapplebloomberg
Find Missing 1000 Numbers in Large Rangemedium-
two sigma
Random Pick with Weightmedium-
amazonappleatlassian
Number of Provincesmedium-
adobeamazonatlassian
Knight Probability in Chessboardmedium-
amazonapplefacebook
Random Pick with Blacklisthard-
amazongoogletwo-sigma
Maximum Sum Circular Subarraymedium-
amazonfacebooktwo-sigma
Longest String Chainmedium-
akuna-capitalamazoncitadel
Last Substring in Lexicographical Orderhard-
goldman-sachsmathworksroblox
Maximum Subarray Sum with One Deletionmedium-
two-sigma