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Barclays LeetCode Questions 2026

Browse LeetCode problems frequently asked by Barclays. 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
Count Submatrices with Top-Left Element and Sum Less Than k	MEDIUM	87.5%	ArrayMatrixPrefix Sum
Double Modular Exponentiation	MEDIUM	87.5%	ArrayMathSimulation
Furthest Point From Origin	EASY	87.5%	StringCounting
Mark Elements on Array by Performing Queries	MEDIUM	87.5%	ArrayHash TableSortingHeap (Priority Queue)Simulation
Lexicographical Numbers	MEDIUM	50%	Depth-First SearchTrie
Valid Parentheses	EASY	50%	StringStack
Number of Islands	MEDIUM	50%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Lexicographically Smallest Generated String	HARD	100%	StringGreedyString Matching
Second Highest Salary	MEDIUM	50%	Database
Longest Common Prefix	EASY	50%	ArrayStringTrie
Next Greater Element I	EASY	50%	ArrayHash TableStackMonotonic Stack
Reverse Words in a String	MEDIUM	50%	Two PointersString
Minimum Number of Days to Make m Bouquets	MEDIUM	50%	ArrayBinary Search
Partition Labels	MEDIUM	62.5%	Hash TableTwo PointersStringGreedy
Two Sum	EASY	50%	ArrayHash Table
Remove Boxes	HARD	50%	ArrayDynamic ProgrammingMemoization

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