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Solution: Maximum Swap

Understand how to maximize an integer by swapping at most two digits using a greedy algorithm. Explore the step-by-step approach to identify the optimal digits to swap and implement the solution efficiently with linear time and space complexity.

Statement

Given an integer num, return the maximum number that can be formed by swapping at most two digits once.

Constraints:

  • 00 \leq num 105\leq 10^5 ...