An integer X (1 ≤ X ≤ 10^9), representing some quantity.
An integer t (1 ≤ t ≤ 10^9), representing some duration or time.

### Example Input:

```
100 17
```

### Function Signature:
Write a function f(X, t) that takes in the input.
def f(X: int, t: int): 
    ''' 
    X: an integer 
    t: an integer
    '''