Top-K Largest Elements in Every Sliding Window

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Quick Overview

This question evaluates the ability to design and maintain an ordered data structure that efficiently tracks the top K largest values within a moving window over an array. It tests knowledge of sliding window techniques combined with balanced search trees or ordered sets, commonly used to assess data structure selection beyond simple heaps or monotonic queues. The question is a practical coding and algorithms problem targeting logarithmic-time updates.

Top-K Largest Elements in Every Sliding Window

Company: Citadel

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: This question evaluates the ability to design and maintain an ordered data structure that efficiently tracks the top K largest values within a moving window over an array. It tests knowledge of sliding window techniques combined with balanced search trees or ordered sets, commonly used to assess data structure selection beyond simple heaps or monotonic queues. The question is a practical coding and algorithms problem targeting logarithmic-time updates.

Read the full Citadel Software Engineer interview experience this question came from

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Citadel
Jun 22, 2026
mediumSoftware EngineerTechnical ScreenCoding & Algorithms
16
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