An integer \(N\) (1 ≤ \(N\) ≤ 100), representing some quantity.
An integer \(K\) (1 ≤ \(K\) ≤ \(N\)), representing another quantity.

### Example Input:
```
13 2
```

### Function Signature:
Write a function f(N, K) that takes in the input.
```python
def f(N: int, K: int):
    '''
    N: an integer
    K: an integer
    '''
```