Grokking Google Coding Interview
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Set Mismatch (easy)
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Problem Statement

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Problem Statement

You are given an array nums of size n, originally containing 1 to n integers. Unfortunately, due to some error, one number got duplicated, replacing another number that now goes missing from the sequence.

Identify the duplicated number and the missing number and return them as a pair.

Examples

  • Example 1:

    • Input: nums = [1,3,3,4]
    • Expected Output: [3,2]
    • Justification: Here, 3 appears twice, and 2 is missing from the sequence.

  • Example 2:

    • Input: nums = [2,2,3,5,4]
    • Expected Output: [2,1]
    • Justification: 2 is duplicated, and 1 is missing, making 2 the repeated number and 1 the missing one.

  • Example 3:

    • Input: nums = [1,5,3,2,7,7,6]
    • Expected Output: [7,4]
    • Justification: In this sequence, 7 is the number that appears twice, and 4 is absent, indicating 7 as the duplicate and 4 as the missing number.

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Python3
Python3
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Problem Statement

Examples

Try it yourself