Merge K Sorted Arrays Without Duplicates

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Quick Overview

Merge k sorted arrays into one ascending list with duplicate values removed. Use a min-heap for O(N log k) time and O(k) extra space, with correct handling of empty arrays and repeated values.

Merge K Sorted Arrays Without Duplicates

Company: Amazon

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: Merge k sorted arrays into one ascending list with duplicate values removed. Use a min-heap for O(N log k) time and O(k) extra space, with correct handling of empty arrays and repeated values.

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

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Jun 4, 2026
mediumSoftware EngineerTechnical ScreenCoding & Algorithms
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