Grokking Meta Coding Interview
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Solution: Maximum Swap

Problem Statement

Given a non-negative integer num, return the maximum number, which you can create by swapping any two digits of the number only once. If no swaps can improve the number, return the original number.

Examples

  1. Example 1:

    • Input: 2736
    • Expected Output: 7236
    • Justification: Swapping the first and second digits (2 and 7) results in the largest possible number.

  2. Example 2:

    • Input: 9965
    • Expected Output: 9965
    • Justification: The number is already in its maximum form, so no swap is needed.

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