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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def support_difference_count(m, m_hat):
 """Count the number of different elements in the support in one triangle, not including the diagonal. """

    m_nnz, m_hat_nnz, intersection_nnz = _nonzero_intersection(m, m_hat)
    return int((m_nnz + m_hat_nnz - (2 * intersection_nnz)) / 2.0)