An integer N (2 ≤ N ≤ 10^5), representing some quantity or size.
A list of tuples where each tuple contains two integers a_i and b_i (1 ≤ a_i, b_i ≤ N).

### Example Input:

```
7
3 6
1 2
3 1
7 4
5 7
1 4
```

### Function Signature:
Write a function f(N, edges) that takes in the input. 
def f(N: int, edges: List[Tuple[int, int]]): 
    ''' 
    N: an integer 
    edges: a list of tuples, each containing two integers
    '''