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Cloudflare LeetCode Questions 2026

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

Last updated: 20 Feb 2026

ProblemDifficultyFrequencyTopics
3SumMEDIUM
87.5%
ArrayTwo PointersSorting
4SumMEDIUM
75%
ArrayTwo PointersSorting
Design a Stack With Increment OperationMEDIUM
87.5%
ArrayStackDesign
Design Circular QueueMEDIUM
100%
ArrayLinked ListDesignQueue
Design Hit CounterMEDIUM
75%
ArrayBinary SearchDesignQueueData Stream
Number of IslandsMEDIUM
62.5%
ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Reaching PointsHARD
87.5%
Math
LRU CacheMEDIUM
75%
Hash TableLinked ListDesignDoubly-Linked List
Logger Rate LimiterEASY
50%
Hash TableDesignData Stream
Merge k Sorted ListsHARD
62.5%
Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
Course ScheduleMEDIUM
50%
Depth-First SearchBreadth-First SearchGraph TheoryTopological Sort

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