from typing import Tuple


def calc_pad_value(src_value: int,
                   dst_value: int) -> Tuple[int, int]:
    """
    Calculate a padding values for a pair of source and destination numbers.

    Parameters:
    ----------
    src_value : int
        Source number.
    dst_value : int
        Destination number.

    Returns:
    -------
    tuple of 2 int
        Left and right paddings.
    """
    assert (dst_value >= src_value)
    if src_value == dst_value:
        pad_left = 0
        pad_right = 0
    else:
        pad_value = dst_value - src_value
        pad_left = pad_value // 2
        pad_right = pad_value - pad_left
    return pad_left, pad_right