
Duplicate Zeros

"Sometimes, zeros resemble very tasty donut. And every time we finish a donut, we want another, and then another, and then another..."
You are given list of integers (int). Your task in this mission is to duplicate (..., 🍩, ... --> ..., 🍩, 🍩, ...) all zeros (think about donuts ;-P) and return the result as any Iterable. Let's look on the example:
Input:...
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