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One Digit Swap

Medium
You are given a non-negative integer number. You may swap two of its digits at most once. Return the largest number you can get this way.
Example 1
number=4182 → 8142

Swap the 4 and the 8 to get 8142.

Example 2
number=8651 → 8651

The digits are already in descending order, so any swap would only make it smaller.

Example 3
number=1993 → 9913
Constraints
  • 0 ≤ number ≤ 10¹⁸
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Topics
GreedyMath
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Input
number=4182
Expected
8142

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