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Write a Python function `highest_power_of_2(n)` that takes an integer `n` as input and returns the highest power of 2 that is less than or equal to `n`. #### Example Usage ```python [main.nopy] highest_power_of_2(10) # Output: 8 highest_power_of_2(19) # Output: 16 highest_power_of_2(32) # Output: 32 ```
def highest_power_of_2(n):
"""
Find the highest power of 2 less than or equal to n.
Args:
n (int): The input number.
Returns:
int: The highest power of 2 less than or equal to n.
"""
# Placeholder for the solution
pass