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Write a Python function `closest_smaller_number(n: int) -> int` that takes an integer `n` and returns the closest smaller number than `n`. #### Example Usage ```python [main.nopy] closest_smaller_number(11) # Output: 10 closest_smaller_number(7) # Output: 6 closest_smaller_number(12) # Output: 11 ``` #### Constraints - The input `n` will always be a positive integer greater than 1.
def closest_smaller_number(n: int) -> int:
"""
Returns the closest smaller number than the given integer n.
Args:
n (int): A positive integer greater than 1.
Returns:
int: The closest smaller number than n.
"""
# Placeholder for the solution
pass