#### Find the Number of 1's in a 2D Array

You are given a two dimensional array containing arrays of integers as arguments. Return the amount of times that the number 1 is found in any of the arrays.

### Requirements

- Must return a single integer

#### Example #1

```
solve([
[1, 4, 2, 1],
[6, 3, 8, 9],
[1, 5, 1, 0]
])
> 4
```