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Solution: Maximum Swap

Explore how to solve the maximum swap problem by applying a greedy algorithm that scans digits to find the optimal swap for the largest possible number. Understand the step-by-step process, including digit manipulation and index tracking, and analyze the time and space complexity of the solution. This lesson helps you grasp a practical greedy technique for coding interviews.

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 ...