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Sig LeetCode Questions 2026

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

Last updated: 10 July 2026

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ProblemDifficultyFrequencyTopics
Text JustificationHARD
100%
ArrayStringSimulation
Spiral MatrixMEDIUM
75%
ArrayMatrixSimulation
Block Placement QueriesHARD
75%
ArrayBinary SearchBinary Indexed TreeSegment Tree
Number of Black BlocksMEDIUM
75%
ArrayHash TableEnumeration
Rotate ImageMEDIUM
87.5%
ArrayMathMatrix
Rotating the BoxMEDIUM
75%
ArrayTwo PointersMatrix
Restore the Array From Adjacent PairsMEDIUM
75%
ArrayHash TableDepth-First Search
Find the Length of the Longest Common PrefixMEDIUM
75%
ArrayHash TableStringTrie
Minimum Absolute Difference Between Elements With ConstraintMEDIUM
75%
ArrayBinary SearchOrdered Set
Design Memory AllocatorMEDIUM
75%
ArrayHash TableDesignSimulation
Find Median from Data StreamHARD
75%
Two PointersDesignSortingHeap (Priority Queue)Data Stream

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