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You are given an integer num. You can swap two digits at most once to get the maximum valued number.

Return the maximum valued number you can get.

 

Example 1:

Input: num = 2736
Output: 7236
Explanation: Swap the number 2 and the number 7.

Example 2:

Input: num = 9973
Output: 9973
Explanation: No swap.

 

Constraints:

  • 0 <= num <= 108

class Solution { public int maximumSwap(int num) { } }