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Openai LeetCode Questions 2026

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

Last updated: 10 July 2026

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Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Simplify Path	MEDIUM	62.5%	StringStack
Design Excel Sum Formula	HARD	75%	ArrayHash TableStringGraph TheoryDesignTopological SortMatrix
Web Crawler Multithreaded	MEDIUM	50%	Depth-First SearchBreadth-First SearchConcurrency
Design SQL	MEDIUM	100%	ArrayHash TableStringDesign
Time Based Key-Value Store	MEDIUM	75%	Hash TableStringBinary SearchDesign
Flatten Nested List Iterator	MEDIUM	87.5%	StackTreeDepth-First SearchDesignQueueIterator
Encode and Decode Strings	MEDIUM	87.5%	ArrayStringDesign
Design Memory Allocator	MEDIUM	87.5%	ArrayHash TableDesignSimulation
Largest Local Values in a Matrix	EASY	50%	ArrayMatrix
Asteroid Collision	MEDIUM	50%	ArrayStackSimulation
IP to CIDR	MEDIUM	75%	StringBit Manipulation
Trapping Rain Water	HARD	50%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Design Spreadsheet	MEDIUM	50%	ArrayHash TableStringDesignMatrix
Rotting Oranges	MEDIUM	75%	ArrayBreadth-First SearchMatrix
Design Hit Counter	MEDIUM	50%	ArrayBinary SearchDesignQueueData Stream
Design Authentication Manager	MEDIUM	50%	Hash TableLinked ListDesignDoubly-Linked List
Snapshot Array	MEDIUM	50%	ArrayHash TableBinary SearchDesign

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