def timing(func):
  def wrapper(*args, **kwargs):
    import time
    start_time = time.time()
    result = func(*args, **kwargs)
    print(f'Function {func.__name__} took {time.time() - start_time:.2f}s')
    return result
  return wrapper
  

@timing
def slow_f(n: int) -> int:
  import time
  time.sleep(2)
  return n * 2