f input planes.

    Args:
        output_size: the target output size :math:`L_{out}`.

    Shape:
        - Input: :math:`(N, C, L_{in})` or :math:`(C, L_{in})`.
        - Output: :math:`(N, C, L_{out})` or :math:`(C, L_{out})`, where
          :math:`L_{out}=\text{output\_size}`.

    Examples:
        >>> # target output size of 5
        >>> m = nn.AdaptiveAvgPool1d(5)
        >>> input = torch.randn(1, 64, 8)
        >>> output = m(input)

    r]