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Solution: Largest Number After Digit Swaps by Parity

Explore how to solve the problem of maximizing an integer by swapping its digits only if they share the same parity. Learn to use max-heaps to separate odd and even digits and reconstruct the number for the largest possible value while maintaining parity constraints. Understand the algorithm's time and space complexity and how to implement it efficiently in Python.

Statement

You are given a positive integer num. You can swap any two digits of num as long as they share the same parity (both are odd or both are even).

Your task is to return the largest possible value of num after performing any number of such swaps.

Constraints:

  • 11 \leq num 109\leq 10^9

Solution

The algorithm rearranges the digits of a given integer num ...