Given an integer array nums, return an array answer of the same length where answer[i] is the number of indices j such that:

• j > i

• nums[j] < nums[i]

• nums[i] and nums[j] have opposite parities (one is even and the other is odd)

Constraints:

• $1 \leq$ nums.length $\leq 10^5$

• $1 \leq$ nums[i] $\leq 10^9$

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We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

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