An integer N (1 ≤ N ≤ 10^5), representing some quantity or size.
An integer A (1 ≤ A ≤ 26), representing some limit or range.
An integer K (1 ≤ K ≤ 10^18), representing some position or index.
A list of integers SA of size N, where each integer SA[i] (1 ≤ SA[i] ≤ N) represents some index or position. All integers in SA are unique.

### Example Input:

```
3
4
2
2
1
3
```

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