(This question has been seen in the interviews of the following companies: Google)
Given a 2d array with two rows, find out the number of non-empty subarrays filled with 0. A subarray may have either 1 or 2 rows.
input
[[0, 0, 2],
[[0, 0, 0]]
expected output
12
(
5 * [[0]]
3 * [[0, 0]]
2 * [[0], [0]]
1 * [[0, 0, 0]]
1 * [[0, 0], [0, 0]]
)
input
[[2, 0, 0, 0, 0]
[0, 0, 0, 0, 1]]
expected output
26
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