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Reddit LeetCode Questions 2026

Browse LeetCode problems frequently asked by Reddit. Filter by difficulty and timeframe to focus your interview prep.

Last updated: 10 July 2026

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ProblemDifficultyFrequencyTopics
Number of Ways to Buy Pens and PencilsMEDIUM
100%
MathEnumeration
Design Hit CounterMEDIUM
75%
ArrayBinary SearchDesignQueueData Stream
Word LadderHARD
100%
Hash TableStringBreadth-First Search
LRU CacheMEDIUM
75%
Hash TableLinked ListDesignDoubly-Linked List
Logger Rate LimiterEASY
75%
Hash TableDesignData Stream

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