QUESTIONS BY COMPANY

Jane Street LeetCode Questions 2026

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

Last updated: 10 July 2026

Try CodingInterviewAI free on a practice problem

New accounts get 10 free credits for the free AI model—up to five complete problems.

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Longest Common Prefix	EASY	62.5%	ArrayStringTrie
Stream of Characters	HARD	62.5%	ArrayStringDesignTrieData Stream
Add Two Integers	EASY	62.5%	Math
Minimum Time to Make Array Sum At Most x	HARD	100%	ArrayDynamic ProgrammingSorting
Walking Robot Simulation	MEDIUM	100%	ArrayHash TableSimulation
Count Common Words With One Occurrence	EASY	100%	ArrayHash TableStringCounting
Add Strings	EASY	62.5%	MathStringSimulation
Design a Text Editor	HARD	75%	Linked ListStringStackDesignSimulationDoubly-Linked List
Teemo Attacking	EASY	62.5%	ArraySimulation
Valid Parentheses	EASY	62.5%	StringStack
LRU Cache	MEDIUM	75%	Hash TableLinked ListDesignDoubly-Linked List
Two Sum	EASY	62.5%	ArrayHash Table
Number of Orders in the Backlog	MEDIUM	62.5%	ArrayHeap (Priority Queue)Simulation
Add Two Numbers	MEDIUM	62.5%	Linked ListMathRecursion
Evaluate Division	MEDIUM	62.5%	ArrayStringDepth-First SearchBreadth-First SearchUnion-FindGraph TheoryShortest Path

Find algorithm patterns and generate explained solutions.