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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 1-18 of 18 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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Array36String19Depth-First Search18

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StatusTitleDifficulty
79. Word SearchOpen sourceMedium
98. Validate Binary Search TreeOpen sourceMedium
100. Same TreeOpen sourceEasy
104. Maximum Depth of Binary TreeOpen sourceEasy
124. Binary Tree Maximum Path SumOpen sourceHard
133. Clone GraphOpen sourceMedium
200. Number of IslandsOpen sourceMedium
207. Course ScheduleOpen sourceMedium
211. Design Add and Search Words Data StructureOpen sourceMedium
226. Invert Binary TreeOpen sourceEasy
230. Kth Smallest Element in a BSTOpen sourceMedium
235. Lowest Common Ancestor of a Binary Search TreeOpen sourceMedium
261. Graph Valid TreeOpen sourcePremiumMedium
269. Alien DictionaryOpen sourcePremiumHard
297. Serialize and Deserialize Binary TreeOpen sourceHard
323. Number of Connected Components in an Undirected GraphOpen sourcePremiumMedium
417. Pacific Atlantic Water FlowOpen sourceMedium
572. Subtree of Another TreeOpen sourceEasy