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Citi LeetCode Questions 2026

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

Last updated: 10 July 2026

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ProblemDifficultyFrequencyTopics
Best Time to Buy and Sell StockEASY
87.5%
ArrayDynamic Programming
Two SumEASY
100%
ArrayHash Table
Evaluate Reverse Polish NotationMEDIUM
75%
ArrayMathStack
Rotate ImageMEDIUM
75%
ArrayMathMatrix
Minimum Size Subarray SumMEDIUM
75%
ArrayBinary SearchSliding WindowPrefix Sum
Number of Visible People in a QueueHARD
75%
ArrayStackMonotonic Stack
Longest Substring Without Repeating CharactersMEDIUM
75%
Hash TableStringSliding Window

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