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Problem Library

Master these coding challenges to ace your next technical interview. Handpicked problems with personalized spaced repetition.

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All tracksBlind 75NeetCode 150NeetCode 250Striver A to ZSDE Sheet

Showing 1-13 of 13 matching problems in Blind 75.

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All topicsArrayBacktrackingBinary LiftingBinary SearchBinary Search TreeBinary TreeBit ManipulationBracket SequencesBreadth-First SearchBrute-Force SearchBucket SortCombinatoricsComplete KnapsackCountingData StreamDepth-First SearchDesignDirected Acyclic Graph

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StatusTitleDifficulty
100. Same TreeOpen sourceEasy
102. Binary Tree Level Order TraversalOpen sourceMedium
104. Maximum Depth of Binary TreeOpen sourceEasy
133. Clone GraphOpen sourceMedium
200. Number of IslandsOpen sourceMedium
207. Course ScheduleOpen sourceMedium
226. Invert Binary TreeOpen sourceEasy
261. Graph Valid TreeOpen sourcePremiumMedium
269. Alien DictionaryOpen sourcePremiumHard
297. Serialize and Deserialize Binary TreeOpen sourceHard
322. Coin ChangeOpen sourceMedium
323. Number of Connected Components in an Undirected GraphOpen sourcePremiumMedium
417. Pacific Atlantic Water FlowOpen sourceMedium