Given an integer array nums, return the total number of subarrays filled entirely with $0$.

Note: A subarray is a contiguous non empty sequence of elements within an array.

Constraints:

• $1 \leq$ nums.length $\leq 10^5$

• $-10^9 \leq$ 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.

Implement your solution in the following coding playground.