An integer N (1 ≤ N ≤ 300), representing some quantity or size.
An integer M (1 ≤ M ≤ 300), representing another quantity or size.
A 2D list of integers A of size NxM, where each integer is either 0 or 1.

### Example Input:

```
2 2
0 1
1 0
```

### Function Signature:
Write a function f(N, M, A) that takes in the input.
def f(N: int, M: int, A: List[List[int]]):
    '''
    N: an integer
    M: an integer
    A: a 2D list of integers
    '''