Zero-filled Subarrays II

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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