Problem · Array

Merge K Sorted Arrays Without Duplicates

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Problem statement

Given k integer arrays in arrays, where every array is sorted in nondecreasing order, merge them into one sorted array.

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Examples

Example 1

arrays = [[1,2,2,7],[2,3,7],[1,5,8]]return = [1,2,3,5,7,8]

The merge preserves sorted order while emitting shared values such as 1, 2, and 7 only once.

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Reported in 1 Amazon interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 1 more worked example, explained
  • Guided hints and editorial
  • Run your code on real test cases
$9/month

Pro subscription, billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week