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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 8 of 81 problems in NeetCode 250.

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All topicsArrayBacktrackingBinary SearchBinary Search TreeBinary TreeBit ManipulationBreadth-First SearchCombinatoricsCountingDepth-First SearchDesignDivide and ConquerDoubly-Linked ListDynamic ProgrammingGraph TheoryGreedyHash TableHeap (Priority Queue)

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StatusTitleDifficulty
48. Rotate ImageMedium
54. Spiral MatrixMedium
73. Set Matrix ZeroesMedium
74. Search a 2D MatrixMedium
79. Word SearchMedium
130. Surrounded RegionsMedium
200. Number of IslandsMedium
212. Word Search IIHard