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Solution: Sort Array By Parity II

Explore how to solve the Sort Array by Parity II problem by implementing a modified cyclic sort algorithm that uses two pointers to place even numbers at even indices and odd numbers at odd indices. Understand the step-by-step process, including pointer movement and swapping logic, to achieve an optimal O(n) time and O(1) space complexity solution.

Statement

You are given an integer array, nums, where exactly half of the elements are even, and the other half are odd.

Rearrange nums such that:

  • All even numbers are placed at even indexes ...