An integer N (3 ≤ N ≤ 2 × 10^5), representing some quantity or size.
A list of N-1 pairs of integers (a_i, b_i) where each integer is between 1 and N.

### Example Input:

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

### 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 of two integers
    '''
