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Longest Sublists Length

Write a Python function `find_max_length(lst)` that takes a list of lists as input and returns the length of the longest sublist. If the input list is empty, the function should return `0`.

#### Example Usage
```python [main.nopy]
print(find_max_length([[1], [1, 4], [5, 6, 7, 8]]))  # Output: 4
print(find_max_length([[0, 1], [2, 2], [3, 2, 1]]))  # Output: 3
print(find_max_length([[7], [22, 23], [13, 14, 15], [10, 20, 30, 40, 50]]))  # Output: 5
print(find_max_length([]))  # Output: 0
```
def find_max_length(lst):
    """
    Find the length of the longest sublist in a list of lists.

    Args:
        lst (list of lists): A list containing sublists.

    Returns:
        int: The length of the longest sublist.
    """
    # Implement the function logic here
    pass