Given an integer num, return the maximum number that can be formed by swapping at most two digits once.
Constraints:
num
The problem involves maximizing a number by swapping two digits at most once. The key idea is to find a smaller digit on the left and a larger digit on the right that can be swapped to create the largest possible number. By scanning the digits from right to left, we can identify the optimal pair for swapping in a single pass, ensuring efficiency. This approach uses a greedy algorithm, as it makes the best possible decision at each step to maximize the number.
Here’s the step-by-step implementation of the solution:
Convert the input number to a string and then to a list of digits. This allows easy manipulation of individual digits.
Use the max_digit_index to track the index of the maximum digit encountered so far (starting from the right).
Use ...
Given an integer num, return the maximum number that can be formed by swapping at most two digits once.
Constraints:
num
The problem involves maximizing a number by swapping two digits at most once. The key idea is to find a smaller digit on the left and a larger digit on the right that can be swapped to create the largest possible number. By scanning the digits from right to left, we can identify the optimal pair for swapping in a single pass, ensuring efficiency. This approach uses a greedy algorithm, as it makes the best possible decision at each step to maximize the number.
Here’s the step-by-step implementation of the solution:
Convert the input number to a string and then to a list of digits. This allows easy manipulation of individual digits.
Use the max_digit_index to track the index of the maximum digit encountered so far (starting from the right).
Use ...