An integer N (1 ≤ N ≤ 10), representing some quantity or size.
A string bit_line of length 2^N consisting of '1' and '0'.

### Example Input:

```
3
01100110
```

### Function Signature:
Write a function f(N, bit_line) that takes in the input.
def f(N: int, bit_line: str):
    '''
    N: an integer
    bit_line: a string
    '''