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Solution: Maximum Swap

Explore the maximum swap problem where you learn to identify and swap two digits to form the largest possible number. Understand how a greedy approach scans digits from right to left to determine the ideal swap in linear time. This lesson helps you implement an efficient solution using string manipulation and index tracking to optimize the number with one swap.

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 ...